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-rw-r--r--kernel/perf_event.c458
-rw-r--r--kernel/sched.c6
-rw-r--r--kernel/trace/Kconfig37
-rw-r--r--kernel/trace/Makefile2
-rw-r--r--kernel/trace/ftrace.c5
-rw-r--r--kernel/trace/kmemtrace.c529
-rw-r--r--kernel/trace/ring_buffer.c38
-rw-r--r--kernel/trace/trace.c8
-rw-r--r--kernel/trace/trace.h68
-rw-r--r--kernel/trace/trace_boot.c185
-rw-r--r--kernel/trace/trace_clock.c5
-rw-r--r--kernel/trace/trace_entries.h62
-rw-r--r--kernel/trace/trace_event_perf.c2
-rw-r--r--kernel/trace/trace_events.c5
-rw-r--r--kernel/trace/trace_functions.c6
-rw-r--r--kernel/trace/trace_sched_wakeup.c5
-rw-r--r--kernel/trace/trace_stack.c6
-rw-r--r--kernel/trace/trace_sysprof.c7
18 files changed, 265 insertions, 1169 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index ff86c558af4c..c772a3d4000d 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -675,7 +675,6 @@ group_sched_in(struct perf_event *group_event,
struct perf_event *event, *partial_group = NULL;
const struct pmu *pmu = group_event->pmu;
bool txn = false;
- int ret;
if (group_event->state == PERF_EVENT_STATE_OFF)
return 0;
@@ -703,14 +702,8 @@ group_sched_in(struct perf_event *group_event,
}
}
- if (!txn)
- return 0;
-
- ret = pmu->commit_txn(pmu);
- if (!ret) {
- pmu->cancel_txn(pmu);
+ if (!txn || !pmu->commit_txn(pmu))
return 0;
- }
group_error:
/*
@@ -1155,9 +1148,9 @@ static void __perf_event_sync_stat(struct perf_event *event,
* In order to keep per-task stats reliable we need to flip the event
* values when we flip the contexts.
*/
- value = atomic64_read(&next_event->count);
- value = atomic64_xchg(&event->count, value);
- atomic64_set(&next_event->count, value);
+ value = local64_read(&next_event->count);
+ value = local64_xchg(&event->count, value);
+ local64_set(&next_event->count, value);
swap(event->total_time_enabled, next_event->total_time_enabled);
swap(event->total_time_running, next_event->total_time_running);
@@ -1547,10 +1540,10 @@ static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count)
hwc->sample_period = sample_period;
- if (atomic64_read(&hwc->period_left) > 8*sample_period) {
+ if (local64_read(&hwc->period_left) > 8*sample_period) {
perf_disable();
perf_event_stop(event);
- atomic64_set(&hwc->period_left, 0);
+ local64_set(&hwc->period_left, 0);
perf_event_start(event);
perf_enable();
}
@@ -1591,7 +1584,7 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
perf_disable();
event->pmu->read(event);
- now = atomic64_read(&event->count);
+ now = local64_read(&event->count);
delta = now - hwc->freq_count_stamp;
hwc->freq_count_stamp = now;
@@ -1743,6 +1736,11 @@ static void __perf_event_read(void *info)
event->pmu->read(event);
}
+static inline u64 perf_event_count(struct perf_event *event)
+{
+ return local64_read(&event->count) + atomic64_read(&event->child_count);
+}
+
static u64 perf_event_read(struct perf_event *event)
{
/*
@@ -1762,7 +1760,7 @@ static u64 perf_event_read(struct perf_event *event)
raw_spin_unlock_irqrestore(&ctx->lock, flags);
}
- return atomic64_read(&event->count);
+ return perf_event_count(event);
}
/*
@@ -1883,7 +1881,7 @@ static void free_event_rcu(struct rcu_head *head)
}
static void perf_pending_sync(struct perf_event *event);
-static void perf_mmap_data_put(struct perf_mmap_data *data);
+static void perf_buffer_put(struct perf_buffer *buffer);
static void free_event(struct perf_event *event)
{
@@ -1891,7 +1889,7 @@ static void free_event(struct perf_event *event)
if (!event->parent) {
atomic_dec(&nr_events);
- if (event->attr.mmap)
+ if (event->attr.mmap || event->attr.mmap_data)
atomic_dec(&nr_mmap_events);
if (event->attr.comm)
atomic_dec(&nr_comm_events);
@@ -1899,9 +1897,9 @@ static void free_event(struct perf_event *event)
atomic_dec(&nr_task_events);
}
- if (event->data) {
- perf_mmap_data_put(event->data);
- event->data = NULL;
+ if (event->buffer) {
+ perf_buffer_put(event->buffer);
+ event->buffer = NULL;
}
if (event->destroy)
@@ -2126,13 +2124,13 @@ perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
static unsigned int perf_poll(struct file *file, poll_table *wait)
{
struct perf_event *event = file->private_data;
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
unsigned int events = POLL_HUP;
rcu_read_lock();
- data = rcu_dereference(event->data);
- if (data)
- events = atomic_xchg(&data->poll, 0);
+ buffer = rcu_dereference(event->buffer);
+ if (buffer)
+ events = atomic_xchg(&buffer->poll, 0);
rcu_read_unlock();
poll_wait(file, &event->waitq, wait);
@@ -2143,7 +2141,7 @@ static unsigned int perf_poll(struct file *file, poll_table *wait)
static void perf_event_reset(struct perf_event *event)
{
(void)perf_event_read(event);
- atomic64_set(&event->count, 0);
+ local64_set(&event->count, 0);
perf_event_update_userpage(event);
}
@@ -2342,14 +2340,14 @@ static int perf_event_index(struct perf_event *event)
void perf_event_update_userpage(struct perf_event *event)
{
struct perf_event_mmap_page *userpg;
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
rcu_read_lock();
- data = rcu_dereference(event->data);
- if (!data)
+ buffer = rcu_dereference(event->buffer);
+ if (!buffer)
goto unlock;
- userpg = data->user_page;
+ userpg = buffer->user_page;
/*
* Disable preemption so as to not let the corresponding user-space
@@ -2359,9 +2357,9 @@ void perf_event_update_userpage(struct perf_event *event)
++userpg->lock;
barrier();
userpg->index = perf_event_index(event);
- userpg->offset = atomic64_read(&event->count);
+ userpg->offset = perf_event_count(event);
if (event->state == PERF_EVENT_STATE_ACTIVE)
- userpg->offset -= atomic64_read(&event->hw.prev_count);
+ userpg->offset -= local64_read(&event->hw.prev_count);
userpg->time_enabled = event->total_time_enabled +
atomic64_read(&event->child_total_time_enabled);
@@ -2376,6 +2374,25 @@ unlock:
rcu_read_unlock();
}
+static unsigned long perf_data_size(struct perf_buffer *buffer);
+
+static void
+perf_buffer_init(struct perf_buffer *buffer, long watermark, int flags)
+{
+ long max_size = perf_data_size(buffer);
+
+ if (watermark)
+ buffer->watermark = min(max_size, watermark);
+
+ if (!buffer->watermark)
+ buffer->watermark = max_size / 2;
+
+ if (flags & PERF_BUFFER_WRITABLE)
+ buffer->writable = 1;
+
+ atomic_set(&buffer->refcount, 1);
+}
+
#ifndef CONFIG_PERF_USE_VMALLOC
/*
@@ -2383,15 +2400,15 @@ unlock:
*/
static struct page *
-perf_mmap_to_page(struct perf_mmap_data *data, unsigned long pgoff)
+perf_mmap_to_page(struct perf_buffer *buffer, unsigned long pgoff)
{
- if (pgoff > data->nr_pages)
+ if (pgoff > buffer->nr_pages)
return NULL;
if (pgoff == 0)
- return virt_to_page(data->user_page);
+ return virt_to_page(buffer->user_page);
- return virt_to_page(data->data_pages[pgoff - 1]);
+ return virt_to_page(buffer->data_pages[pgoff - 1]);
}
static void *perf_mmap_alloc_page(int cpu)
@@ -2407,42 +2424,44 @@ static void *perf_mmap_alloc_page(int cpu)
return page_address(page);
}
-static struct perf_mmap_data *
-perf_mmap_data_alloc(struct perf_event *event, int nr_pages)
+static struct perf_buffer *
+perf_buffer_alloc(int nr_pages, long watermark, int cpu, int flags)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
unsigned long size;
int i;
- size = sizeof(struct perf_mmap_data);
+ size = sizeof(struct perf_buffer);
size += nr_pages * sizeof(void *);
- data = kzalloc(size, GFP_KERNEL);
- if (!data)
+ buffer = kzalloc(size, GFP_KERNEL);
+ if (!buffer)
goto fail;
- data->user_page = perf_mmap_alloc_page(event->cpu);
- if (!data->user_page)
+ buffer->user_page = perf_mmap_alloc_page(cpu);
+ if (!buffer->user_page)
goto fail_user_page;
for (i = 0; i < nr_pages; i++) {
- data->data_pages[i] = perf_mmap_alloc_page(event->cpu);
- if (!data->data_pages[i])
+ buffer->data_pages[i] = perf_mmap_alloc_page(cpu);
+ if (!buffer->data_pages[i])
goto fail_data_pages;
}
- data->nr_pages = nr_pages;
+ buffer->nr_pages = nr_pages;
+
+ perf_buffer_init(buffer, watermark, flags);
- return data;
+ return buffer;
fail_data_pages:
for (i--; i >= 0; i--)
- free_page((unsigned long)data->data_pages[i]);
+ free_page((unsigned long)buffer->data_pages[i]);
- free_page((unsigned long)data->user_page);
+ free_page((unsigned long)buffer->user_page);
fail_user_page:
- kfree(data);
+ kfree(buffer);
fail:
return NULL;
@@ -2456,17 +2475,17 @@ static void perf_mmap_free_page(unsigned long addr)
__free_page(page);
}
-static void perf_mmap_data_free(struct perf_mmap_data *data)
+static void perf_buffer_free(struct perf_buffer *buffer)
{
int i;
- perf_mmap_free_page((unsigned long)data->user_page);
- for (i = 0; i < data->nr_pages; i++)
- perf_mmap_free_page((unsigned long)data->data_pages[i]);
- kfree(data);
+ perf_mmap_free_page((unsigned long)buffer->user_page);
+ for (i = 0; i < buffer->nr_pages; i++)
+ perf_mmap_free_page((unsigned long)buffer->data_pages[i]);
+ kfree(buffer);
}
-static inline int page_order(struct perf_mmap_data *data)
+static inline int page_order(struct perf_buffer *buffer)
{
return 0;
}
@@ -2479,18 +2498,18 @@ static inline int page_order(struct perf_mmap_data *data)
* Required for architectures that have d-cache aliasing issues.
*/
-static inline int page_order(struct perf_mmap_data *data)
+static inline int page_order(struct perf_buffer *buffer)
{
- return data->page_order;
+ return buffer->page_order;
}
static struct page *
-perf_mmap_to_page(struct perf_mmap_data *data, unsigned long pgoff)
+perf_mmap_to_page(struct perf_buffer *buffer, unsigned long pgoff)
{
- if (pgoff > (1UL << page_order(data)))
+ if (pgoff > (1UL << page_order(buffer)))
return NULL;
- return vmalloc_to_page((void *)data->user_page + pgoff * PAGE_SIZE);
+ return vmalloc_to_page((void *)buffer->user_page + pgoff * PAGE_SIZE);
}
static void perf_mmap_unmark_page(void *addr)
@@ -2500,57 +2519,59 @@ static void perf_mmap_unmark_page(void *addr)
page->mapping = NULL;
}
-static void perf_mmap_data_free_work(struct work_struct *work)
+static void perf_buffer_free_work(struct work_struct *work)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
void *base;
int i, nr;
- data = container_of(work, struct perf_mmap_data, work);
- nr = 1 << page_order(data);
+ buffer = container_of(work, struct perf_buffer, work);
+ nr = 1 << page_order(buffer);
- base = data->user_page;
+ base = buffer->user_page;
for (i = 0; i < nr + 1; i++)
perf_mmap_unmark_page(base + (i * PAGE_SIZE));
vfree(base);
- kfree(data);
+ kfree(buffer);
}
-static void perf_mmap_data_free(struct perf_mmap_data *data)
+static void perf_buffer_free(struct perf_buffer *buffer)
{
- schedule_work(&data->work);
+ schedule_work(&buffer->work);
}
-static struct perf_mmap_data *
-perf_mmap_data_alloc(struct perf_event *event, int nr_pages)
+static struct perf_buffer *
+perf_buffer_alloc(int nr_pages, long watermark, int cpu, int flags)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
unsigned long size;
void *all_buf;
- size = sizeof(struct perf_mmap_data);
+ size = sizeof(struct perf_buffer);
size += sizeof(void *);
- data = kzalloc(size, GFP_KERNEL);
- if (!data)
+ buffer = kzalloc(size, GFP_KERNEL);
+ if (!buffer)
goto fail;
- INIT_WORK(&data->work, perf_mmap_data_free_work);
+ INIT_WORK(&buffer->work, perf_buffer_free_work);
all_buf = vmalloc_user((nr_pages + 1) * PAGE_SIZE);
if (!all_buf)
goto fail_all_buf;
- data->user_page = all_buf;
- data->data_pages[0] = all_buf + PAGE_SIZE;
- data->page_order = ilog2(nr_pages);
- data->nr_pages = 1;
+ buffer->user_page = all_buf;
+ buffer->data_pages[0] = all_buf + PAGE_SIZE;
+ buffer->page_order = ilog2(nr_pages);
+ buffer->nr_pages = 1;
+
+ perf_buffer_init(buffer, watermark, flags);
- return data;
+ return buffer;
fail_all_buf:
- kfree(data);
+ kfree(buffer);
fail:
return NULL;
@@ -2558,15 +2579,15 @@ fail:
#endif
-static unsigned long perf_data_size(struct perf_mmap_data *data)
+static unsigned long perf_data_size(struct perf_buffer *buffer)
{
- return data->nr_pages << (PAGE_SHIFT + page_order(data));
+ return buffer->nr_pages << (PAGE_SHIFT + page_order(buffer));
}
static int perf_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct perf_event *event = vma->vm_file->private_data;
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
int ret = VM_FAULT_SIGBUS;
if (vmf->flags & FAULT_FLAG_MKWRITE) {
@@ -2576,14 +2597,14 @@ static int perf_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
rcu_read_lock();
- data = rcu_dereference(event->data);
- if (!data)
+ buffer = rcu_dereference(event->buffer);
+ if (!buffer)
goto unlock;
if (vmf->pgoff && (vmf->flags & FAULT_FLAG_WRITE))
goto unlock;
- vmf->page = perf_mmap_to_page(data, vmf->pgoff);
+ vmf->page = perf_mmap_to_page(buffer, vmf->pgoff);
if (!vmf->page)
goto unlock;
@@ -2598,52 +2619,35 @@ unlock:
return ret;
}
-static void
-perf_mmap_data_init(struct perf_event *event, struct perf_mmap_data *data)
-{
- long max_size = perf_data_size(data);
-
- if (event->attr.watermark) {
- data->watermark = min_t(long, max_size,
- event->attr.wakeup_watermark);
- }
-
- if (!data->watermark)
- data->watermark = max_size / 2;
-
- atomic_set(&data->refcount, 1);
- rcu_assign_pointer(event->data, data);
-}
-
-static void perf_mmap_data_free_rcu(struct rcu_head *rcu_head)
+static void perf_buffer_free_rcu(struct rcu_head *rcu_head)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
- data = container_of(rcu_head, struct perf_mmap_data, rcu_head);
- perf_mmap_data_free(data);
+ buffer = container_of(rcu_head, struct perf_buffer, rcu_head);
+ perf_buffer_free(buffer);
}
-static struct perf_mmap_data *perf_mmap_data_get(struct perf_event *event)
+static struct perf_buffer *perf_buffer_get(struct perf_event *event)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
rcu_read_lock();
- data = rcu_dereference(event->data);
- if (data) {
- if (!atomic_inc_not_zero(&data->refcount))
- data = NULL;
+ buffer = rcu_dereference(event->buffer);
+ if (buffer) {
+ if (!atomic_inc_not_zero(&buffer->refcount))
+ buffer = NULL;
}
rcu_read_unlock();
- return data;
+ return buffer;
}
-static void perf_mmap_data_put(struct perf_mmap_data *data)
+static void perf_buffer_put(struct perf_buffer *buffer)
{
- if (!atomic_dec_and_test(&data->refcount))
+ if (!atomic_dec_and_test(&buffer->refcount))
return;
- call_rcu(&data->rcu_head, perf_mmap_data_free_rcu);
+ call_rcu(&buffer->rcu_head, perf_buffer_free_rcu);
}
static void perf_mmap_open(struct vm_area_struct *vma)
@@ -2658,16 +2662,16 @@ static void perf_mmap_close(struct vm_area_struct *vma)
struct perf_event *event = vma->vm_file->private_data;
if (atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex)) {
- unsigned long size = perf_data_size(event->data);
+ unsigned long size = perf_data_size(event->buffer);
struct user_struct *user = event->mmap_user;
- struct perf_mmap_data *data = event->data;
+ struct perf_buffer *buffer = event->buffer;
atomic_long_sub((size >> PAGE_SHIFT) + 1, &user->locked_vm);
vma->vm_mm->locked_vm -= event->mmap_locked;
- rcu_assign_pointer(event->data, NULL);
+ rcu_assign_pointer(event->buffer, NULL);
mutex_unlock(&event->mmap_mutex);
- perf_mmap_data_put(data);
+ perf_buffer_put(buffer);
free_uid(user);
}
}
@@ -2685,11 +2689,11 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
unsigned long user_locked, user_lock_limit;
struct user_struct *user = current_user();
unsigned long locked, lock_limit;
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
unsigned long vma_size;
unsigned long nr_pages;
long user_extra, extra;
- int ret = 0;
+ int ret = 0, flags = 0;
/*
* Don't allow mmap() of inherited per-task counters. This would
@@ -2706,7 +2710,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
nr_pages = (vma_size / PAGE_SIZE) - 1;
/*
- * If we have data pages ensure they're a power-of-two number, so we
+ * If we have buffer pages ensure they're a power-of-two number, so we
* can do bitmasks instead of modulo.
*/
if (nr_pages != 0 && !is_power_of_2(nr_pages))
@@ -2720,9 +2724,9 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
WARN_ON_ONCE(event->ctx->parent_ctx);
mutex_lock(&event->mmap_mutex);
- if (event->data) {
- if (event->data->nr_pages == nr_pages)
- atomic_inc(&event->data->refcount);
+ if (event->buffer) {
+ if (event->buffer->nr_pages == nr_pages)
+ atomic_inc(&event->buffer->refcount);
else
ret = -EINVAL;
goto unlock;
@@ -2752,17 +2756,18 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
goto unlock;
}
- WARN_ON(event->data);
+ WARN_ON(event->buffer);
+
+ if (vma->vm_flags & VM_WRITE)
+ flags |= PERF_BUFFER_WRITABLE;
- data = perf_mmap_data_alloc(event, nr_pages);
- if (!data) {
+ buffer = perf_buffer_alloc(nr_pages, event->attr.wakeup_watermark,
+ event->cpu, flags);
+ if (!buffer) {
ret = -ENOMEM;
goto unlock;
}
-
- perf_mmap_data_init(event, data);
- if (vma->vm_flags & VM_WRITE)
- event->data->writable = 1;
+ rcu_assign_pointer(event->buffer, buffer);
atomic_long_add(user_extra, &user->locked_vm);
event->mmap_locked = extra;
@@ -2941,11 +2946,6 @@ __weak struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
return NULL;
}
-__weak
-void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
-{
-}
-
/*
* We assume there is only KVM supporting the callbacks.
@@ -2971,15 +2971,15 @@ EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
/*
* Output
*/
-static bool perf_output_space(struct perf_mmap_data *data, unsigned long tail,
+static bool perf_output_space(struct perf_buffer *buffer, unsigned long tail,
unsigned long offset, unsigned long head)
{
unsigned long mask;
- if (!data->writable)
+ if (!buffer->writable)
return true;
- mask = perf_data_size(data) - 1;
+ mask = perf_data_size(buffer) - 1;
offset = (offset - tail) & mask;
head = (head - tail) & mask;
@@ -2992,7 +2992,7 @@ static bool perf_output_space(struct perf_mmap_data *data, unsigned long tail,
static void perf_output_wakeup(struct perf_output_handle *handle)
{
- atomic_set(&handle->data->poll, POLL_IN);
+ atomic_set(&handle->buffer->poll, POLL_IN);
if (handle->nmi) {
handle->event->pending_wakeup = 1;
@@ -3012,45 +3012,45 @@ static void perf_output_wakeup(struct perf_output_handle *handle)
*/
static void perf_output_get_handle(struct perf_output_handle *handle)
{
- struct perf_mmap_data *data = handle->data;
+ struct perf_buffer *buffer = handle->buffer;
preempt_disable();
- local_inc(&data->nest);
- handle->wakeup = local_read(&data->wakeup);
+ local_inc(&buffer->nest);
+ handle->wakeup = local_read(&buffer->wakeup);
}
static void perf_output_put_handle(struct perf_output_handle *handle)
{
- struct perf_mmap_data *data = handle->data;
+ struct perf_buffer *buffer = handle->buffer;
unsigned long head;
again:
- head = local_read(&data->head);
+ head = local_read(&buffer->head);
/*
* IRQ/NMI can happen here, which means we can miss a head update.
*/
- if (!local_dec_and_test(&data->nest))
+ if (!local_dec_and_test(&buffer->nest))
goto out;
/*
* Publish the known good head. Rely on the full barrier implied
- * by atomic_dec_and_test() order the data->head read and this
+ * by atomic_dec_and_test() order the buffer->head read and this
* write.
*/
- data->user_page->data_head = head;
+ buffer->user_page->data_head = head;
/*
* Now check if we missed an update, rely on the (compiler)
- * barrier in atomic_dec_and_test() to re-read data->head.
+ * barrier in atomic_dec_and_test() to re-read buffer->head.
*/
- if (unlikely(head != local_read(&data->head))) {
- local_inc(&data->nest);
+ if (unlikely(head != local_read(&buffer->head))) {
+ local_inc(&buffer->nest);
goto again;
}
- if (handle->wakeup != local_read(&data->wakeup))
+ if (handle->wakeup != local_read(&buffer->wakeup))
perf_output_wakeup(handle);
out:
@@ -3070,12 +3070,12 @@ __always_inline void perf_output_copy(struct perf_output_handle *handle,
buf += size;
handle->size -= size;
if (!handle->size) {
- struct perf_mmap_data *data = handle->data;
+ struct perf_buffer *buffer = handle->buffer;
handle->page++;
- handle->page &= data->nr_pages - 1;
- handle->addr = data->data_pages[handle->page];
- handle->size = PAGE_SIZE << page_order(data);
+ handle->page &= buffer->nr_pages - 1;
+ handle->addr = buffer->data_pages[handle->page];
+ handle->size = PAGE_SIZE << page_order(buffer);
}
} while (len);
}
@@ -3084,7 +3084,7 @@ int perf_output_begin(struct perf_output_handle *handle,
struct perf_event *event, unsigned int size,
int nmi, int sample)
{
- struct perf_mmap_data *data;
+ struct perf_buffer *buffer;
unsigned long tail, offset, head;
int have_lost;
struct {
@@ -3100,19 +3100,19 @@ int perf_output_begin(struct perf_output_handle *handle,
if (event->parent)
event = event->parent;
- data = rcu_dereference(event->data);
- if (!data)
+ buffer = rcu_dereference(event->buffer);
+ if (!buffer)
goto out;
- handle->data = data;
+ handle->buffer = buffer;
handle->event = event;
handle->nmi = nmi;
handle->sample = sample;
- if (!data->nr_pages)
+ if (!buffer->nr_pages)
goto out;
- have_lost = local_read(&data->lost);
+ have_lost = local_read(&buffer->lost);
if (have_lost)
size += sizeof(lost_event);
@@ -3124,30 +3124,30 @@ int perf_output_begin(struct perf_output_handle *handle,
* tail pointer. So that all reads will be completed before the
* write is issued.
*/
- tail = ACCESS_ONCE(data->user_page->data_tail);
+ tail = ACCESS_ONCE(buffer->user_page->data_tail);
smp_rmb();
- offset = head = local_read(&data->head);
+ offset = head = local_read(&buffer->head);
head += size;
- if (unlikely(!perf_output_space(data, tail, offset, head)))
+ if (unlikely(!perf_output_space(buffer, tail, offset, head)))
goto fail;
- } while (local_cmpxchg(&data->head, offset, head) != offset);
+ } while (local_cmpxchg(&buffer->head, offset, head) != offset);
- if (head - local_read(&data->wakeup) > data->watermark)
- local_add(data->watermark, &data->wakeup);
+ if (head - local_read(&buffer->wakeup) > buffer->watermark)
+ local_add(buffer->watermark, &buffer->wakeup);
- handle->page = offset >> (PAGE_SHIFT + page_order(data));
- handle->page &= data->nr_pages - 1;
- handle->size = offset & ((PAGE_SIZE << page_order(data)) - 1);
- handle->addr = data->data_pages[handle->page];
+ handle->page = offset >> (PAGE_SHIFT + page_order(buffer));
+ handle->page &= buffer->nr_pages - 1;
+ handle->size = offset & ((PAGE_SIZE << page_order(buffer)) - 1);
+ handle->addr = buffer->data_pages[handle->page];
handle->addr += handle->size;
- handle->size = (PAGE_SIZE << page_order(data)) - handle->size;
+ handle->size = (PAGE_SIZE << page_order(buffer)) - handle->size;
if (have_lost) {
lost_event.header.type = PERF_RECORD_LOST;
lost_event.header.misc = 0;
lost_event.header.size = sizeof(lost_event);
lost_event.id = event->id;
- lost_event.lost = local_xchg(&data->lost, 0);
+ lost_event.lost = local_xchg(&buffer->lost, 0);
perf_output_put(handle, lost_event);
}
@@ -3155,7 +3155,7 @@ int perf_output_begin(struct perf_output_handle *handle,
return 0;
fail:
- local_inc(&data->lost);
+ local_inc(&buffer->lost);
perf_output_put_handle(handle);
out:
rcu_read_unlock();
@@ -3166,15 +3166,15 @@ out:
void perf_output_end(struct perf_output_handle *handle)
{
struct perf_event *event = handle->event;
- struct perf_mmap_data *data = handle->data;
+ struct perf_buffer *buffer = handle->buffer;
int wakeup_events = event->attr.wakeup_events;
if (handle->sample && wakeup_events) {
- int events = local_inc_return(&data->events);
+ int events = local_inc_return(&buffer->events);
if (events >= wakeup_events) {
- local_sub(wakeup_events, &data->events);
- local_inc(&data->wakeup);
+ local_sub(wakeup_events, &buffer->events);
+ local_inc(&buffer->wakeup);
}
}
@@ -3211,7 +3211,7 @@ static void perf_output_read_one(struct perf_output_handle *handle,
u64 values[4];
int n = 0;
- values[n++] = atomic64_read(&event->count);
+ values[n++] = perf_event_count(event);
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
values[n++] = event->total_time_enabled +
atomic64_read(&event->child_total_time_enabled);
@@ -3248,7 +3248,7 @@ static void perf_output_read_group(struct perf_output_handle *handle,
if (leader != event)
leader->pmu->read(leader);
- values[n++] = atomic64_read(&leader->count);
+ values[n++] = perf_event_count(leader);
if (read_format & PERF_FORMAT_ID)
values[n++] = primary_event_id(leader);
@@ -3260,7 +3260,7 @@ static void perf_output_read_group(struct perf_output_handle *handle,
if (sub != event)
sub->pmu->read(sub);
- values[n++] = atomic64_read(&sub->count);
+ values[n++] = perf_event_count(sub);
if (read_format & PERF_FORMAT_ID)
values[n++] = primary_event_id(sub);
@@ -3491,7 +3491,7 @@ perf_event_read_event(struct perf_event *event,
/*
* task tracking -- fork/exit
*
- * enabled by: attr.comm | attr.mmap | attr.task
+ * enabled by: attr.comm | attr.mmap | attr.mmap_data | attr.task
*/
struct perf_task_event {
@@ -3541,7 +3541,8 @@ static int perf_event_task_match(struct perf_event *event)
if (event->cpu != -1 && event->cpu != smp_processor_id())
return 0;
- if (event->attr.comm || event->attr.mmap || event->attr.task)
+ if (event->attr.comm || event->attr.mmap ||
+ event->attr.mmap_data || event->attr.task)
return 1;
return 0;
@@ -3766,7 +3767,8 @@ static void perf_event_mmap_output(struct perf_event *event,
}
static int perf_event_mmap_match(struct perf_event *event,
- struct perf_mmap_event *mmap_event)
+ struct perf_mmap_event *mmap_event,
+ int executable)
{
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
@@ -3774,19 +3776,21 @@ static int perf_event_mmap_match(struct perf_event *event,
if (event->cpu != -1 && event->cpu != smp_processor_id())
return 0;
- if (event->attr.mmap)
+ if ((!executable && event->attr.mmap_data) ||
+ (executable && event->attr.mmap))
return 1;
return 0;
}
static void perf_event_mmap_ctx(struct perf_event_context *ctx,
- struct perf_mmap_event *mmap_event)
+ struct perf_mmap_event *mmap_event,
+ int executable)
{
struct perf_event *event;
list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
- if (perf_event_mmap_match(event, mmap_event))
+ if (perf_event_mmap_match(event, mmap_event, executable))
perf_event_mmap_output(event, mmap_event);
}
}
@@ -3830,6 +3834,14 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
if (!vma->vm_mm) {
name = strncpy(tmp, "[vdso]", sizeof(tmp));
goto got_name;
+ } else if (vma->vm_start <= vma->vm_mm->start_brk &&
+ vma->vm_end >= vma->vm_mm->brk) {
+ name = strncpy(tmp, "[heap]", sizeof(tmp));
+ goto got_name;
+ } else if (vma->vm_start <= vma->vm_mm->start_stack &&
+ vma->vm_end >= vma->vm_mm->start_stack) {
+ name = strncpy(tmp, "[stack]", sizeof(tmp));
+ goto got_name;
}
name = strncpy(tmp, "//anon", sizeof(tmp));
@@ -3846,17 +3858,17 @@ got_name:
rcu_read_lock();
cpuctx = &get_cpu_var(perf_cpu_context);
- perf_event_mmap_ctx(&cpuctx->ctx, mmap_event);
+ perf_event_mmap_ctx(&cpuctx->ctx, mmap_event, vma->vm_flags & VM_EXEC);
ctx = rcu_dereference(current->perf_event_ctxp);
if (ctx)
- perf_event_mmap_ctx(ctx, mmap_event);
+ perf_event_mmap_ctx(ctx, mmap_event, vma->vm_flags & VM_EXEC);
put_cpu_var(perf_cpu_context);
rcu_read_unlock();
kfree(buf);
}
-void __perf_event_mmap(struct vm_area_struct *vma)
+void perf_event_mmap(struct vm_area_struct *vma)
{
struct perf_mmap_event mmap_event;
@@ -4018,14 +4030,14 @@ static u64 perf_swevent_set_period(struct perf_event *event)
hwc->last_period = hwc->sample_period;
again:
- old = val = atomic64_read(&hwc->period_left);
+ old = val = local64_read(&hwc->period_left);
if (val < 0)
return 0;
nr = div64_u64(period + val, period);
offset = nr * period;
val -= offset;
- if (atomic64_cmpxchg(&hwc->period_left, old, val) != old)
+ if (local64_cmpxchg(&hwc->period_left, old, val) != old)
goto again;
return nr;
@@ -4064,7 +4076,7 @@ static void perf_swevent_add(struct perf_event *event, u64 nr,
{
struct hw_perf_event *hwc = &event->hw;
- atomic64_add(nr, &event->count);
+ local64_add(nr, &event->count);
if (!regs)
return;
@@ -4075,7 +4087,7 @@ static void perf_swevent_add(struct perf_event *event, u64 nr,
if (nr == 1 && hwc->sample_period == 1 && !event->attr.freq)
return perf_swevent_overflow(event, 1, nmi, data, regs);
- if (atomic64_add_negative(nr, &hwc->period_left))
+ if (local64_add_negative(nr, &hwc->period_left))
return;
perf_swevent_overflow(event, 0, nmi, data, regs);
@@ -4213,14 +4225,12 @@ int perf_swevent_get_recursion_context(void)
}
EXPORT_SYMBOL_GPL(perf_swevent_get_recursion_context);
-void perf_swevent_put_recursion_context(int rctx)
+void inline perf_swevent_put_recursion_context(int rctx)
{
struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
barrier();
cpuctx->recursion[rctx]--;
}
-EXPORT_SYMBOL_GPL(perf_swevent_put_recursion_context);
-
void __perf_sw_event(u32 event_id, u64 nr, int nmi,
struct pt_regs *regs, u64 addr)
@@ -4368,8 +4378,8 @@ static void cpu_clock_perf_event_update(struct perf_event *event)
u64 now;
now = cpu_clock(cpu);
- prev = atomic64_xchg(&event->hw.prev_count, now);
- atomic64_add(now - prev, &event->count);
+ prev = local64_xchg(&event->hw.prev_count, now);
+ local64_add(now - prev, &event->count);
}
static int cpu_clock_perf_event_enable(struct perf_event *event)
@@ -4377,7 +4387,7 @@ static int cpu_clock_perf_event_enable(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int cpu = raw_smp_processor_id();
- atomic64_set(&hwc->prev_count, cpu_clock(cpu));
+ local64_set(&hwc->prev_count, cpu_clock(cpu));
perf_swevent_start_hrtimer(event);
return 0;
@@ -4409,9 +4419,9 @@ static void task_clock_perf_event_update(struct perf_event *event, u64 now)
u64 prev;
s64 delta;
- prev = atomic64_xchg(&event->hw.prev_count, now);
+ prev = local64_xchg(&event->hw.prev_count, now);
delta = now - prev;
- atomic64_add(delta, &event->count);
+ local64_add(delta, &event->count);
}
static int task_clock_perf_event_enable(struct perf_event *event)
@@ -4421,7 +4431,7 @@ static int task_clock_perf_event_enable(struct perf_event *event)
now = event->ctx->time;
- atomic64_set(&hwc->prev_count, now);
+ local64_set(&hwc->prev_count, now);
perf_swevent_start_hrtimer(event);
@@ -4601,7 +4611,7 @@ static int perf_tp_event_match(struct perf_event *event,
}
void perf_tp_event(u64 addr, u64 count, void *record, int entry_size,
- struct pt_regs *regs, struct hlist_head *head)
+ struct pt_regs *regs, struct hlist_head *head, int rctx)
{
struct perf_sample_data data;
struct perf_event *event;
@@ -4615,12 +4625,12 @@ void perf_tp_event(u64 addr, u64 count, void *record, int entry_size,
perf_sample_data_init(&data, addr);
data.raw = &raw;
- rcu_read_lock();
hlist_for_each_entry_rcu(event, node, head, hlist_entry) {
if (perf_tp_event_match(event, &data, regs))
perf_swevent_add(event, count, 1, &data, regs);
}
- rcu_read_unlock();
+
+ perf_swevent_put_recursion_context(rctx);
}
EXPORT_SYMBOL_GPL(perf_tp_event);
@@ -4864,7 +4874,7 @@ perf_event_alloc(struct perf_event_attr *attr,
hwc->sample_period = 1;
hwc->last_period = hwc->sample_period;
- atomic64_set(&hwc->period_left, hwc->sample_period);
+ local64_set(&hwc->period_left, hwc->sample_period);
/*
* we currently do not support PERF_FORMAT_GROUP on inherited events
@@ -4913,7 +4923,7 @@ done:
if (!event->parent) {
atomic_inc(&nr_events);
- if (event->attr.mmap)
+ if (event->attr.mmap || event->attr.mmap_data)
atomic_inc(&nr_mmap_events);
if (event->attr.comm)
atomic_inc(&nr_comm_events);
@@ -5007,7 +5017,7 @@ err_size:
static int
perf_event_set_output(struct perf_event *event, struct perf_event *output_event)
{
- struct perf_mmap_data *data = NULL, *old_data = NULL;
+ struct perf_buffer *buffer = NULL, *old_buffer = NULL;
int ret = -EINVAL;
if (!output_event)
@@ -5037,19 +5047,19 @@ set:
if (output_event) {
/* get the buffer we want to redirect to */
- data = perf_mmap_data_get(output_event);
- if (!data)
+ buffer = perf_buffer_get(output_event);
+ if (!buffer)
goto unlock;
}
- old_data = event->data;
- rcu_assign_pointer(event->data, data);
+ old_buffer = event->buffer;
+ rcu_assign_pointer(event->buffer, buffer);
ret = 0;
unlock:
mutex_unlock(&event->mmap_mutex);
- if (old_data)
- perf_mmap_data_put(old_data);
+ if (old_buffer)
+ perf_buffer_put(old_buffer);
out:
return ret;
}
@@ -5298,7 +5308,7 @@ inherit_event(struct perf_event *parent_event,
hwc->sample_period = sample_period;
hwc->last_period = sample_period;
- atomic64_set(&hwc->period_left, sample_period);
+ local64_set(&hwc->period_left, sample_period);
}
child_event->overflow_handler = parent_event->overflow_handler;
@@ -5359,12 +5369,12 @@ static void sync_child_event(struct perf_event *child_event,
if (child_event->attr.inherit_stat)
perf_event_read_event(child_event, child);
- child_val = atomic64_read(&child_event->count);
+ child_val = perf_event_count(child_event);
/*
* Add back the child's count to the parent's count:
*/
- atomic64_add(child_val, &parent_event->count);
+ atomic64_add(child_val, &parent_event->child_count);
atomic64_add(child_event->total_time_enabled,
&parent_event->child_total_time_enabled);
atomic64_add(child_event->total_time_running,
diff --git a/kernel/sched.c b/kernel/sched.c
index f8b8996228dd..3c5d34a4e932 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3717,7 +3717,7 @@ int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner)
* off of preempt_enable. Kernel preemptions off return from interrupt
* occur there and call schedule directly.
*/
-asmlinkage void __sched preempt_schedule(void)
+asmlinkage void __sched notrace preempt_schedule(void)
{
struct thread_info *ti = current_thread_info();
@@ -3729,9 +3729,9 @@ asmlinkage void __sched preempt_schedule(void)
return;
do {
- add_preempt_count(PREEMPT_ACTIVE);
+ add_preempt_count_notrace(PREEMPT_ACTIVE);
schedule();
- sub_preempt_count(PREEMPT_ACTIVE);
+ sub_preempt_count_notrace(PREEMPT_ACTIVE);
/*
* Check again in case we missed a preemption opportunity
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 8b1797c4545b..f669092fdead 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -229,23 +229,6 @@ config FTRACE_SYSCALLS
help
Basic tracer to catch the syscall entry and exit events.
-config BOOT_TRACER
- bool "Trace boot initcalls"
- select GENERIC_TRACER
- select CONTEXT_SWITCH_TRACER
- help
- This tracer helps developers to optimize boot times: it records
- the timings of the initcalls and traces key events and the identity
- of tasks that can cause boot delays, such as context-switches.
-
- Its aim is to be parsed by the scripts/bootgraph.pl tool to
- produce pretty graphics about boot inefficiencies, giving a visual
- representation of the delays during initcalls - but the raw
- /debug/tracing/trace text output is readable too.
-
- You must pass in initcall_debug and ftrace=initcall to the kernel
- command line to enable this on bootup.
-
config TRACE_BRANCH_PROFILING
bool
select GENERIC_TRACER
@@ -371,26 +354,6 @@ config STACK_TRACER
Say N if unsure.
-config KMEMTRACE
- bool "Trace SLAB allocations"
- select GENERIC_TRACER
- help
- kmemtrace provides tracing for slab allocator functions, such as
- kmalloc, kfree, kmem_cache_alloc, kmem_cache_free, etc. Collected
- data is then fed to the userspace application in order to analyse
- allocation hotspots, internal fragmentation and so on, making it
- possible to see how well an allocator performs, as well as debug
- and profile kernel code.
-
- This requires an userspace application to use. See
- Documentation/trace/kmemtrace.txt for more information.
-
- Saying Y will make the kernel somewhat larger and slower. However,
- if you disable kmemtrace at run-time or boot-time, the performance
- impact is minimal (depending on the arch the kernel is built for).
-
- If unsure, say N.
-
config WORKQUEUE_TRACER
bool "Trace workqueues"
select GENERIC_TRACER
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index ffb1a5b0550e..469a1c7555a5 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -38,10 +38,8 @@ obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o
obj-$(CONFIG_NOP_TRACER) += trace_nop.o
obj-$(CONFIG_STACK_TRACER) += trace_stack.o
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
-obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
-obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
ifeq ($(CONFIG_BLOCK),y)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 6d2cb14f9449..0d88ce9b9fb8 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1883,7 +1883,6 @@ function_trace_probe_call(unsigned long ip, unsigned long parent_ip)
struct hlist_head *hhd;
struct hlist_node *n;
unsigned long key;
- int resched;
key = hash_long(ip, FTRACE_HASH_BITS);
@@ -1897,12 +1896,12 @@ function_trace_probe_call(unsigned long ip, unsigned long parent_ip)
* period. This syncs the hash iteration and freeing of items
* on the hash. rcu_read_lock is too dangerous here.
*/
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
hlist_for_each_entry_rcu(entry, n, hhd, node) {
if (entry->ip == ip)
entry->ops->func(ip, parent_ip, &entry->data);
}
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
}
static struct ftrace_ops trace_probe_ops __read_mostly =
diff --git a/kernel/trace/kmemtrace.c b/kernel/trace/kmemtrace.c
deleted file mode 100644
index bbfc1bb1660b..000000000000
--- a/kernel/trace/kmemtrace.c
+++ /dev/null
@@ -1,529 +0,0 @@
-/*
- * Memory allocator tracing
- *
- * Copyright (C) 2008 Eduard - Gabriel Munteanu
- * Copyright (C) 2008 Pekka Enberg <penberg@cs.helsinki.fi>
- * Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
- */
-
-#include <linux/tracepoint.h>
-#include <linux/seq_file.h>
-#include <linux/debugfs.h>
-#include <linux/dcache.h>
-#include <linux/fs.h>
-
-#include <linux/kmemtrace.h>
-
-#include "trace_output.h"
-#include "trace.h"
-
-/* Select an alternative, minimalistic output than the original one */
-#define TRACE_KMEM_OPT_MINIMAL 0x1
-
-static struct tracer_opt kmem_opts[] = {
- /* Default disable the minimalistic output */
- { TRACER_OPT(kmem_minimalistic, TRACE_KMEM_OPT_MINIMAL) },
- { }
-};
-
-static struct tracer_flags kmem_tracer_flags = {
- .val = 0,
- .opts = kmem_opts
-};
-
-static struct trace_array *kmemtrace_array;
-
-/* Trace allocations */
-static inline void kmemtrace_alloc(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- struct ftrace_event_call *call = &event_kmem_alloc;
- struct trace_array *tr = kmemtrace_array;
- struct kmemtrace_alloc_entry *entry;
- struct ring_buffer_event *event;
-
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
- if (!event)
- return;
-
- entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, 0, 0);
-
- entry->ent.type = TRACE_KMEM_ALLOC;
- entry->type_id = type_id;
- entry->call_site = call_site;
- entry->ptr = ptr;
- entry->bytes_req = bytes_req;
- entry->bytes_alloc = bytes_alloc;
- entry->gfp_flags = gfp_flags;
- entry->node = node;
-
- if (!filter_check_discard(call, entry, tr->buffer, event))
- ring_buffer_unlock_commit(tr->buffer, event);
-
- trace_wake_up();
-}
-
-static inline void kmemtrace_free(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr)
-{
- struct ftrace_event_call *call = &event_kmem_free;
- struct trace_array *tr = kmemtrace_array;
- struct kmemtrace_free_entry *entry;
- struct ring_buffer_event *event;
-
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
- if (!event)
- return;
- entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, 0, 0);
-
- entry->ent.type = TRACE_KMEM_FREE;
- entry->type_id = type_id;
- entry->call_site = call_site;
- entry->ptr = ptr;
-
- if (!filter_check_discard(call, entry, tr->buffer, event))
- ring_buffer_unlock_commit(tr->buffer, event);
-
- trace_wake_up();
-}
-
-static void kmemtrace_kmalloc(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, -1);
-}
-
-static void kmemtrace_kmem_cache_alloc(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, -1);
-}
-
-static void kmemtrace_kmalloc_node(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, node);
-}
-
-static void kmemtrace_kmem_cache_alloc_node(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, node);
-}
-
-static void
-kmemtrace_kfree(void *ignore, unsigned long call_site, const void *ptr)
-{
- kmemtrace_free(KMEMTRACE_TYPE_KMALLOC, call_site, ptr);
-}
-
-static void kmemtrace_kmem_cache_free(void *ignore,
- unsigned long call_site, const void *ptr)
-{
- kmemtrace_free(KMEMTRACE_TYPE_CACHE, call_site, ptr);
-}
-
-static int kmemtrace_start_probes(void)
-{
- int err;
-
- err = register_trace_kmalloc(kmemtrace_kmalloc, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
- if (err)
- return err;
- err = register_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
- if (err)
- return err;
- err = register_trace_kfree(kmemtrace_kfree, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
-
- return err;
-}
-
-static void kmemtrace_stop_probes(void)
-{
- unregister_trace_kmalloc(kmemtrace_kmalloc, NULL);
- unregister_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
- unregister_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
- unregister_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
- unregister_trace_kfree(kmemtrace_kfree, NULL);
- unregister_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
-}
-
-static int kmem_trace_init(struct trace_array *tr)
-{
- kmemtrace_array = tr;
-
- tracing_reset_online_cpus(tr);
-
- kmemtrace_start_probes();
-
- return 0;
-}
-
-static void kmem_trace_reset(struct trace_array *tr)
-{
- kmemtrace_stop_probes();
-}
-
-static void kmemtrace_headers(struct seq_file *s)
-{
- /* Don't need headers for the original kmemtrace output */
- if (!(kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL))
- return;
-
- seq_printf(s, "#\n");
- seq_printf(s, "# ALLOC TYPE REQ GIVEN FLAGS "
- " POINTER NODE CALLER\n");
- seq_printf(s, "# FREE | | | | "
- " | | | |\n");
- seq_printf(s, "# |\n\n");
-}
-
-/*
- * The following functions give the original output from kmemtrace,
- * plus the origin CPU, since reordering occurs in-kernel now.
- */
-
-#define KMEMTRACE_USER_ALLOC 0
-#define KMEMTRACE_USER_FREE 1
-
-struct kmemtrace_user_event {
- u8 event_id;
- u8 type_id;
- u16 event_size;
- u32 cpu;
- u64 timestamp;
- unsigned long call_site;
- unsigned long ptr;
-};
-
-struct kmemtrace_user_event_alloc {
- size_t bytes_req;
- size_t bytes_alloc;
- unsigned gfp_flags;
- int node;
-};
-
-static enum print_line_t
-kmemtrace_print_alloc(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_alloc_entry *entry;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- ret = trace_seq_printf(s, "type_id %d call_site %pF ptr %lu "
- "bytes_req %lu bytes_alloc %lu gfp_flags %lu node %d\n",
- entry->type_id, (void *)entry->call_site, (unsigned long)entry->ptr,
- (unsigned long)entry->bytes_req, (unsigned long)entry->bytes_alloc,
- (unsigned long)entry->gfp_flags, entry->node);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_free_entry *entry;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- ret = trace_seq_printf(s, "type_id %d call_site %pF ptr %lu\n",
- entry->type_id, (void *)entry->call_site,
- (unsigned long)entry->ptr);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_alloc_user(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_alloc_entry *entry;
- struct kmemtrace_user_event *ev;
- struct kmemtrace_user_event_alloc *ev_alloc;
-
- trace_assign_type(entry, iter->ent);
-
- ev = trace_seq_reserve(s, sizeof(*ev));
- if (!ev)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev->event_id = KMEMTRACE_USER_ALLOC;
- ev->type_id = entry->type_id;
- ev->event_size = sizeof(*ev) + sizeof(*ev_alloc);
- ev->cpu = iter->cpu;
- ev->timestamp = iter->ts;
- ev->call_site = entry->call_site;
- ev->ptr = (unsigned long)entry->ptr;
-
- ev_alloc = trace_seq_reserve(s, sizeof(*ev_alloc));
- if (!ev_alloc)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev_alloc->bytes_req = entry->bytes_req;
- ev_alloc->bytes_alloc = entry->bytes_alloc;
- ev_alloc->gfp_flags = entry->gfp_flags;
- ev_alloc->node = entry->node;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free_user(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_free_entry *entry;
- struct kmemtrace_user_event *ev;
-
- trace_assign_type(entry, iter->ent);
-
- ev = trace_seq_reserve(s, sizeof(*ev));
- if (!ev)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev->event_id = KMEMTRACE_USER_FREE;
- ev->type_id = entry->type_id;
- ev->event_size = sizeof(*ev);
- ev->cpu = iter->cpu;
- ev->timestamp = iter->ts;
- ev->call_site = entry->call_site;
- ev->ptr = (unsigned long)entry->ptr;
-
- return TRACE_TYPE_HANDLED;
-}
-
-/* The two other following provide a more minimalistic output */
-static enum print_line_t
-kmemtrace_print_alloc_compress(struct trace_iterator *iter)
-{
- struct kmemtrace_alloc_entry *entry;
- struct trace_seq *s = &iter->seq;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- /* Alloc entry */
- ret = trace_seq_printf(s, " + ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Type */
- switch (entry->type_id) {
- case KMEMTRACE_TYPE_KMALLOC:
- ret = trace_seq_printf(s, "K ");
- break;
- case KMEMTRACE_TYPE_CACHE:
- ret = trace_seq_printf(s, "C ");
- break;
- case KMEMTRACE_TYPE_PAGES:
- ret = trace_seq_printf(s, "P ");
- break;
- default:
- ret = trace_seq_printf(s, "? ");
- }
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Requested */
- ret = trace_seq_printf(s, "%4zu ", entry->bytes_req);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Allocated */
- ret = trace_seq_printf(s, "%4zu ", entry->bytes_alloc);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Flags
- * TODO: would be better to see the name of the GFP flag names
- */
- ret = trace_seq_printf(s, "%08x ", entry->gfp_flags);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Pointer to allocated */
- ret = trace_seq_printf(s, "0x%tx ", (ptrdiff_t)entry->ptr);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Node and call site*/
- ret = trace_seq_printf(s, "%4d %pf\n", entry->node,
- (void *)entry->call_site);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free_compress(struct trace_iterator *iter)
-{
- struct kmemtrace_free_entry *entry;
- struct trace_seq *s = &iter->seq;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- /* Free entry */
- ret = trace_seq_printf(s, " - ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Type */
- switch (entry->type_id) {
- case KMEMTRACE_TYPE_KMALLOC:
- ret = trace_seq_printf(s, "K ");
- break;
- case KMEMTRACE_TYPE_CACHE:
- ret = trace_seq_printf(s, "C ");
- break;
- case KMEMTRACE_TYPE_PAGES:
- ret = trace_seq_printf(s, "P ");
- break;
- default:
- ret = trace_seq_printf(s, "? ");
- }
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Skip requested/allocated/flags */
- ret = trace_seq_printf(s, " ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Pointer to allocated */
- ret = trace_seq_printf(s, "0x%tx ", (ptrdiff_t)entry->ptr);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Skip node and print call site*/
- ret = trace_seq_printf(s, " %pf\n", (void *)entry->call_site);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t kmemtrace_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
-
- if (!(kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL))
- return TRACE_TYPE_UNHANDLED;
-
- switch (entry->type) {
- case TRACE_KMEM_ALLOC:
- return kmemtrace_print_alloc_compress(iter);
- case TRACE_KMEM_FREE:
- return kmemtrace_print_free_compress(iter);
- default:
- return TRACE_TYPE_UNHANDLED;
- }
-}
-
-static struct trace_event_functions kmem_trace_alloc_funcs = {
- .trace = kmemtrace_print_alloc,
- .binary = kmemtrace_print_alloc_user,
-};
-
-static struct trace_event kmem_trace_alloc = {
- .type = TRACE_KMEM_ALLOC,
- .funcs = &kmem_trace_alloc_funcs,
-};
-
-static struct trace_event_functions kmem_trace_free_funcs = {
- .trace = kmemtrace_print_free,
- .binary = kmemtrace_print_free_user,
-};
-
-static struct trace_event kmem_trace_free = {
- .type = TRACE_KMEM_FREE,
- .funcs = &kmem_trace_free_funcs,
-};
-
-static struct tracer kmem_tracer __read_mostly = {
- .name = "kmemtrace",
- .init = kmem_trace_init,
- .reset = kmem_trace_reset,
- .print_line = kmemtrace_print_line,
- .print_header = kmemtrace_headers,
- .flags = &kmem_tracer_flags
-};
-
-void kmemtrace_init(void)
-{
- /* earliest opportunity to start kmem tracing */
-}
-
-static int __init init_kmem_tracer(void)
-{
- if (!register_ftrace_event(&kmem_trace_alloc)) {
- pr_warning("Warning: could not register kmem events\n");
- return 1;
- }
-
- if (!register_ftrace_event(&kmem_trace_free)) {
- pr_warning("Warning: could not register kmem events\n");
- return 1;
- }
-
- if (register_tracer(&kmem_tracer) != 0) {
- pr_warning("Warning: could not register the kmem tracer\n");
- return 1;
- }
-
- return 0;
-}
-device_initcall(init_kmem_tracer);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 1da7b6ea8b85..28d0615a513f 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2242,8 +2242,6 @@ static void trace_recursive_unlock(void)
#endif
-static DEFINE_PER_CPU(int, rb_need_resched);
-
/**
* ring_buffer_lock_reserve - reserve a part of the buffer
* @buffer: the ring buffer to reserve from
@@ -2264,13 +2262,13 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer, unsigned long length)
{
struct ring_buffer_per_cpu *cpu_buffer;
struct ring_buffer_event *event;
- int cpu, resched;
+ int cpu;
if (ring_buffer_flags != RB_BUFFERS_ON)
return NULL;
/* If we are tracing schedule, we don't want to recurse */
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
if (atomic_read(&buffer->record_disabled))
goto out_nocheck;
@@ -2295,21 +2293,13 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer, unsigned long length)
if (!event)
goto out;
- /*
- * Need to store resched state on this cpu.
- * Only the first needs to.
- */
-
- if (preempt_count() == 1)
- per_cpu(rb_need_resched, cpu) = resched;
-
return event;
out:
trace_recursive_unlock();
out_nocheck:
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
return NULL;
}
EXPORT_SYMBOL_GPL(ring_buffer_lock_reserve);
@@ -2355,13 +2345,7 @@ int ring_buffer_unlock_commit(struct ring_buffer *buffer,
trace_recursive_unlock();
- /*
- * Only the last preempt count needs to restore preemption.
- */
- if (preempt_count() == 1)
- ftrace_preempt_enable(per_cpu(rb_need_resched, cpu));
- else
- preempt_enable_no_resched_notrace();
+ preempt_enable_notrace();
return 0;
}
@@ -2469,13 +2453,7 @@ void ring_buffer_discard_commit(struct ring_buffer *buffer,
trace_recursive_unlock();
- /*
- * Only the last preempt count needs to restore preemption.
- */
- if (preempt_count() == 1)
- ftrace_preempt_enable(per_cpu(rb_need_resched, cpu));
- else
- preempt_enable_no_resched_notrace();
+ preempt_enable_notrace();
}
EXPORT_SYMBOL_GPL(ring_buffer_discard_commit);
@@ -2501,12 +2479,12 @@ int ring_buffer_write(struct ring_buffer *buffer,
struct ring_buffer_event *event;
void *body;
int ret = -EBUSY;
- int cpu, resched;
+ int cpu;
if (ring_buffer_flags != RB_BUFFERS_ON)
return -EBUSY;
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
if (atomic_read(&buffer->record_disabled))
goto out;
@@ -2536,7 +2514,7 @@ int ring_buffer_write(struct ring_buffer *buffer,
ret = 0;
out:
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
return ret;
}
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 086d36316805..8683dec6946b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1404,7 +1404,6 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
struct bprint_entry *entry;
unsigned long flags;
int disable;
- int resched;
int cpu, len = 0, size, pc;
if (unlikely(tracing_selftest_running || tracing_disabled))
@@ -1414,7 +1413,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
pause_graph_tracing();
pc = preempt_count();
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
cpu = raw_smp_processor_id();
data = tr->data[cpu];
@@ -1452,7 +1451,7 @@ out_unlock:
out:
atomic_dec_return(&data->disabled);
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
unpause_graph_tracing();
return len;
@@ -4597,9 +4596,6 @@ __init static int tracer_alloc_buffers(void)
register_tracer(&nop_trace);
current_trace = &nop_trace;
-#ifdef CONFIG_BOOT_TRACER
- register_tracer(&boot_tracer);
-#endif
/* All seems OK, enable tracing */
tracing_disabled = 0;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2cd96399463f..01ce088c1cdf 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -9,10 +9,7 @@
#include <linux/mmiotrace.h>
#include <linux/tracepoint.h>
#include <linux/ftrace.h>
-#include <trace/boot.h>
-#include <linux/kmemtrace.h>
#include <linux/hw_breakpoint.h>
-
#include <linux/trace_seq.h>
#include <linux/ftrace_event.h>
@@ -29,26 +26,15 @@ enum trace_type {
TRACE_MMIO_RW,
TRACE_MMIO_MAP,
TRACE_BRANCH,
- TRACE_BOOT_CALL,
- TRACE_BOOT_RET,
TRACE_GRAPH_RET,
TRACE_GRAPH_ENT,
TRACE_USER_STACK,
- TRACE_KMEM_ALLOC,
- TRACE_KMEM_FREE,
TRACE_BLK,
TRACE_KSYM,
__TRACE_LAST_TYPE,
};
-enum kmemtrace_type_id {
- KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
- KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
- KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
-};
-
-extern struct tracer boot_tracer;
#undef __field
#define __field(type, item) type item;
@@ -209,17 +195,11 @@ extern void __ftrace_bad_type(void);
TRACE_MMIO_RW); \
IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
TRACE_MMIO_MAP); \
- IF_ASSIGN(var, ent, struct trace_boot_call, TRACE_BOOT_CALL);\
- IF_ASSIGN(var, ent, struct trace_boot_ret, TRACE_BOOT_RET);\
IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
TRACE_GRAPH_ENT); \
IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
TRACE_GRAPH_RET); \
- IF_ASSIGN(var, ent, struct kmemtrace_alloc_entry, \
- TRACE_KMEM_ALLOC); \
- IF_ASSIGN(var, ent, struct kmemtrace_free_entry, \
- TRACE_KMEM_FREE); \
IF_ASSIGN(var, ent, struct ksym_trace_entry, TRACE_KSYM);\
__ftrace_bad_type(); \
} while (0)
@@ -628,54 +608,6 @@ enum trace_iterator_flags {
extern struct tracer nop_trace;
-/**
- * ftrace_preempt_disable - disable preemption scheduler safe
- *
- * When tracing can happen inside the scheduler, there exists
- * cases that the tracing might happen before the need_resched
- * flag is checked. If this happens and the tracer calls
- * preempt_enable (after a disable), a schedule might take place
- * causing an infinite recursion.
- *
- * To prevent this, we read the need_resched flag before
- * disabling preemption. When we want to enable preemption we
- * check the flag, if it is set, then we call preempt_enable_no_resched.
- * Otherwise, we call preempt_enable.
- *
- * The rational for doing the above is that if need_resched is set
- * and we have yet to reschedule, we are either in an atomic location
- * (where we do not need to check for scheduling) or we are inside
- * the scheduler and do not want to resched.
- */
-static inline int ftrace_preempt_disable(void)
-{
- int resched;
-
- resched = need_resched();
- preempt_disable_notrace();
-
- return resched;
-}
-
-/**
- * ftrace_preempt_enable - enable preemption scheduler safe
- * @resched: the return value from ftrace_preempt_disable
- *
- * This is a scheduler safe way to enable preemption and not miss
- * any preemption checks. The disabled saved the state of preemption.
- * If resched is set, then we are either inside an atomic or
- * are inside the scheduler (we would have already scheduled
- * otherwise). In this case, we do not want to call normal
- * preempt_enable, but preempt_enable_no_resched instead.
- */
-static inline void ftrace_preempt_enable(int resched)
-{
- if (resched)
- preempt_enable_no_resched_notrace();
- else
- preempt_enable_notrace();
-}
-
#ifdef CONFIG_BRANCH_TRACER
extern int enable_branch_tracing(struct trace_array *tr);
extern void disable_branch_tracing(void);
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
deleted file mode 100644
index c21d5f3956ad..000000000000
--- a/kernel/trace/trace_boot.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- * ring buffer based initcalls tracer
- *
- * Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
- *
- */
-
-#include <linux/init.h>
-#include <linux/debugfs.h>
-#include <linux/ftrace.h>
-#include <linux/kallsyms.h>
-#include <linux/time.h>
-
-#include "trace.h"
-#include "trace_output.h"
-
-static struct trace_array *boot_trace;
-static bool pre_initcalls_finished;
-
-/* Tells the boot tracer that the pre_smp_initcalls are finished.
- * So we are ready .
- * It doesn't enable sched events tracing however.
- * You have to call enable_boot_trace to do so.
- */
-void start_boot_trace(void)
-{
- pre_initcalls_finished = true;
-}
-
-void enable_boot_trace(void)
-{
- if (boot_trace && pre_initcalls_finished)
- tracing_start_sched_switch_record();
-}
-
-void disable_boot_trace(void)
-{
- if (boot_trace && pre_initcalls_finished)
- tracing_stop_sched_switch_record();
-}
-
-static int boot_trace_init(struct trace_array *tr)
-{
- boot_trace = tr;
-
- if (!tr)
- return 0;
-
- tracing_reset_online_cpus(tr);
-
- tracing_sched_switch_assign_trace(tr);
- return 0;
-}
-
-static enum print_line_t
-initcall_call_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
- struct trace_seq *s = &iter->seq;
- struct trace_boot_call *field;
- struct boot_trace_call *call;
- u64 ts;
- unsigned long nsec_rem;
- int ret;
-
- trace_assign_type(field, entry);
- call = &field->boot_call;
- ts = iter->ts;
- nsec_rem = do_div(ts, NSEC_PER_SEC);
-
- ret = trace_seq_printf(s, "[%5ld.%09ld] calling %s @ %i\n",
- (unsigned long)ts, nsec_rem, call->func, call->caller);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- else
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-initcall_ret_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
- struct trace_seq *s = &iter->seq;
- struct trace_boot_ret *field;
- struct boot_trace_ret *init_ret;
- u64 ts;
- unsigned long nsec_rem;
- int ret;
-
- trace_assign_type(field, entry);
- init_ret = &field->boot_ret;
- ts = iter->ts;
- nsec_rem = do_div(ts, NSEC_PER_SEC);
-
- ret = trace_seq_printf(s, "[%5ld.%09ld] initcall %s "
- "returned %d after %llu msecs\n",
- (unsigned long) ts,
- nsec_rem,
- init_ret->func, init_ret->result, init_ret->duration);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- else
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t initcall_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
-
- switch (entry->type) {
- case TRACE_BOOT_CALL:
- return initcall_call_print_line(iter);
- case TRACE_BOOT_RET:
- return initcall_ret_print_line(iter);
- default:
- return TRACE_TYPE_UNHANDLED;
- }
-}
-
-struct tracer boot_tracer __read_mostly =
-{
- .name = "initcall",
- .init = boot_trace_init,
- .reset = tracing_reset_online_cpus,
- .print_line = initcall_print_line,
-};
-
-void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
-{
- struct ftrace_event_call *call = &event_boot_call;
- struct ring_buffer_event *event;
- struct ring_buffer *buffer;
- struct trace_boot_call *entry;
- struct trace_array *tr = boot_trace;
-
- if (!tr || !pre_initcalls_finished)
- return;
-
- /* Get its name now since this function could
- * disappear because it is in the .init section.
- */
- sprint_symbol(bt->func, (unsigned long)fn);
- preempt_disable();
-
- buffer = tr->buffer;
- event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_CALL,
- sizeof(*entry), 0, 0);
- if (!event)
- goto out;
- entry = ring_buffer_event_data(event);
- entry->boot_call = *bt;
- if (!filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, 0, 0);
- out:
- preempt_enable();
-}
-
-void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
-{
- struct ftrace_event_call *call = &event_boot_ret;
- struct ring_buffer_event *event;
- struct ring_buffer *buffer;
- struct trace_boot_ret *entry;
- struct trace_array *tr = boot_trace;
-
- if (!tr || !pre_initcalls_finished)
- return;
-
- sprint_symbol(bt->func, (unsigned long)fn);
- preempt_disable();
-
- buffer = tr->buffer;
- event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_RET,
- sizeof(*entry), 0, 0);
- if (!event)
- goto out;
- entry = ring_buffer_event_data(event);
- entry->boot_ret = *bt;
- if (!filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, 0, 0);
- out:
- preempt_enable();
-}
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 9d589d8dcd1a..52fda6c04ac3 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -32,16 +32,15 @@
u64 notrace trace_clock_local(void)
{
u64 clock;
- int resched;
/*
* sched_clock() is an architecture implemented, fast, scalable,
* lockless clock. It is not guaranteed to be coherent across
* CPUs, nor across CPU idle events.
*/
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
clock = sched_clock();
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
return clock;
}
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index dc008c1240da..13abc157dbaf 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -271,33 +271,6 @@ FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map,
__entry->map_id, __entry->opcode)
);
-FTRACE_ENTRY(boot_call, trace_boot_call,
-
- TRACE_BOOT_CALL,
-
- F_STRUCT(
- __field_struct( struct boot_trace_call, boot_call )
- __field_desc( pid_t, boot_call, caller )
- __array_desc( char, boot_call, func, KSYM_SYMBOL_LEN)
- ),
-
- F_printk("%d %s", __entry->caller, __entry->func)
-);
-
-FTRACE_ENTRY(boot_ret, trace_boot_ret,
-
- TRACE_BOOT_RET,
-
- F_STRUCT(
- __field_struct( struct boot_trace_ret, boot_ret )
- __array_desc( char, boot_ret, func, KSYM_SYMBOL_LEN)
- __field_desc( int, boot_ret, result )
- __field_desc( unsigned long, boot_ret, duration )
- ),
-
- F_printk("%s %d %lx",
- __entry->func, __entry->result, __entry->duration)
-);
#define TRACE_FUNC_SIZE 30
#define TRACE_FILE_SIZE 20
@@ -318,41 +291,6 @@ FTRACE_ENTRY(branch, trace_branch,
__entry->func, __entry->file, __entry->correct)
);
-FTRACE_ENTRY(kmem_alloc, kmemtrace_alloc_entry,
-
- TRACE_KMEM_ALLOC,
-
- F_STRUCT(
- __field( enum kmemtrace_type_id, type_id )
- __field( unsigned long, call_site )
- __field( const void *, ptr )
- __field( size_t, bytes_req )
- __field( size_t, bytes_alloc )
- __field( gfp_t, gfp_flags )
- __field( int, node )
- ),
-
- F_printk("type:%u call_site:%lx ptr:%p req:%zi alloc:%zi"
- " flags:%x node:%d",
- __entry->type_id, __entry->call_site, __entry->ptr,
- __entry->bytes_req, __entry->bytes_alloc,
- __entry->gfp_flags, __entry->node)
-);
-
-FTRACE_ENTRY(kmem_free, kmemtrace_free_entry,
-
- TRACE_KMEM_FREE,
-
- F_STRUCT(
- __field( enum kmemtrace_type_id, type_id )
- __field( unsigned long, call_site )
- __field( const void *, ptr )
- ),
-
- F_printk("type:%u call_site:%lx ptr:%p",
- __entry->type_id, __entry->call_site, __entry->ptr)
-);
-
FTRACE_ENTRY(ksym_trace, ksym_trace_entry,
TRACE_KSYM,
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index e6f65887842c..4799d7047eb0 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -9,8 +9,6 @@
#include <linux/kprobes.h>
#include "trace.h"
-EXPORT_SYMBOL_GPL(perf_arch_fetch_caller_regs);
-
static char *perf_trace_buf[4];
/*
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 53cffc0b0801..a594f9a7ee3d 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1524,12 +1524,11 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
struct ftrace_entry *entry;
unsigned long flags;
long disabled;
- int resched;
int cpu;
int pc;
pc = preempt_count();
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
cpu = raw_smp_processor_id();
disabled = atomic_inc_return(&per_cpu(ftrace_test_event_disable, cpu));
@@ -1551,7 +1550,7 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
out:
atomic_dec(&per_cpu(ftrace_test_event_disable, cpu));
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
}
static struct ftrace_ops trace_ops __initdata =
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index b3f3776b0cd6..16aee4d44e8f 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -54,14 +54,14 @@ function_trace_call_preempt_only(unsigned long ip, unsigned long parent_ip)
struct trace_array_cpu *data;
unsigned long flags;
long disabled;
- int cpu, resched;
+ int cpu;
int pc;
if (unlikely(!ftrace_function_enabled))
return;
pc = preempt_count();
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
local_save_flags(flags);
cpu = raw_smp_processor_id();
data = tr->data[cpu];
@@ -71,7 +71,7 @@ function_trace_call_preempt_only(unsigned long ip, unsigned long parent_ip)
trace_function(tr, ip, parent_ip, flags, pc);
atomic_dec(&data->disabled);
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
}
static void
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0e73bc2ef8c5..c9fd5bd02036 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -46,7 +46,6 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
struct trace_array_cpu *data;
unsigned long flags;
long disabled;
- int resched;
int cpu;
int pc;
@@ -54,7 +53,7 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
return;
pc = preempt_count();
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
cpu = raw_smp_processor_id();
if (cpu != wakeup_current_cpu)
@@ -74,7 +73,7 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
out:
atomic_dec(&data->disabled);
out_enable:
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
}
static struct ftrace_ops trace_ops __read_mostly =
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index f4bc9b27de5f..056468eae7cf 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -110,12 +110,12 @@ static inline void check_stack(void)
static void
stack_trace_call(unsigned long ip, unsigned long parent_ip)
{
- int cpu, resched;
+ int cpu;
if (unlikely(!ftrace_enabled || stack_trace_disabled))
return;
- resched = ftrace_preempt_disable();
+ preempt_disable_notrace();
cpu = raw_smp_processor_id();
/* no atomic needed, we only modify this variable by this cpu */
@@ -127,7 +127,7 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip)
out:
per_cpu(trace_active, cpu)--;
/* prevent recursion in schedule */
- ftrace_preempt_enable(resched);
+ preempt_enable_notrace();
}
static struct ftrace_ops trace_ops __read_mostly =
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index a7974a552ca9..c080956f4d8e 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -33,12 +33,13 @@ static DEFINE_MUTEX(sample_timer_lock);
*/
static DEFINE_PER_CPU(struct hrtimer, stack_trace_hrtimer);
-struct stack_frame {
+struct stack_frame_user {
const void __user *next_fp;
unsigned long return_address;
};
-static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
+static int
+copy_stack_frame(const void __user *fp, struct stack_frame_user *frame)
{
int ret;
@@ -125,7 +126,7 @@ trace_kernel(struct pt_regs *regs, struct trace_array *tr,
static void timer_notify(struct pt_regs *regs, int cpu)
{
struct trace_array_cpu *data;
- struct stack_frame frame;
+ struct stack_frame_user frame;
struct trace_array *tr;
const void __user *fp;
int is_user;
generated by cgit v1.2.3 (git 2.0.4) at 2025-02-14 00:47:50 +0000