diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/Kconfig | 15 | ||||
| -rw-r--r-- | mm/filemap.c | 6 | ||||
| -rw-r--r-- | mm/kmemleak.c | 4 | ||||
| -rw-r--r-- | mm/madvise.c | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 27 | ||||
| -rw-r--r-- | mm/memory-failure.c | 17 | ||||
| -rw-r--r-- | mm/mremap.c | 9 | ||||
| -rw-r--r-- | mm/percpu.c | 2 |
8 files changed, 55 insertions, 27 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index ebe5880c29d6..1b5a95f0fa01 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -581,3 +581,18 @@ config PGTABLE_MAPPING config GENERIC_EARLY_IOREMAP bool + +config MAX_STACK_SIZE_MB + int "Maximum user stack size for 32-bit processes (MB)" + default 80 + range 8 256 if METAG + range 8 2048 + depends on STACK_GROWSUP && (!64BIT || COMPAT) + help + This is the maximum stack size in Megabytes in the VM layout of 32-bit + user processes when the stack grows upwards (currently only on parisc + and metag arch). The stack will be located at the highest memory + address minus the given value, unless the RLIMIT_STACK hard limit is + changed to a smaller value in which case that is used. + + A sane initial value is 80 MB. diff --git a/mm/filemap.c b/mm/filemap.c index 2f724e3cdf24..7499ef19f1c1 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -257,9 +257,11 @@ static int filemap_check_errors(struct address_space *mapping) { int ret = 0; /* Check for outstanding write errors */ - if (test_and_clear_bit(AS_ENOSPC, &mapping->flags)) + if (test_bit(AS_ENOSPC, &mapping->flags) && + test_and_clear_bit(AS_ENOSPC, &mapping->flags)) ret = -ENOSPC; - if (test_and_clear_bit(AS_EIO, &mapping->flags)) + if (test_bit(AS_EIO, &mapping->flags) && + test_and_clear_bit(AS_EIO, &mapping->flags)) ret = -EIO; return ret; } diff --git a/mm/kmemleak.c b/mm/kmemleak.c index 91d67eaee050..8d2fcdfeff7f 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -1775,10 +1775,9 @@ void __init kmemleak_init(void) int i; unsigned long flags; - kmemleak_early_log = 0; - #ifdef CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF if (!kmemleak_skip_disable) { + kmemleak_early_log = 0; kmemleak_disable(); return; } @@ -1796,6 +1795,7 @@ void __init kmemleak_init(void) /* the kernel is still in UP mode, so disabling the IRQs is enough */ local_irq_save(flags); + kmemleak_early_log = 0; if (kmemleak_error) { local_irq_restore(flags); return; diff --git a/mm/madvise.c b/mm/madvise.c index 539eeb96b323..a402f8fdc68e 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -195,7 +195,7 @@ static void force_shm_swapin_readahead(struct vm_area_struct *vma, for (; start < end; start += PAGE_SIZE) { index = ((start - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; - page = find_get_page(mapping, index); + page = find_get_entry(mapping, index); if (!radix_tree_exceptional_entry(page)) { if (page) page_cache_release(page); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c47dffdcb246..5177c6d4a2dd 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1077,9 +1077,18 @@ static struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) rcu_read_lock(); do { - memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); - if (unlikely(!memcg)) + /* + * Page cache insertions can happen withou an + * actual mm context, e.g. during disk probing + * on boot, loopback IO, acct() writes etc. + */ + if (unlikely(!mm)) memcg = root_mem_cgroup; + else { + memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); + if (unlikely(!memcg)) + memcg = root_mem_cgroup; + } } while (!css_tryget(&memcg->css)); rcu_read_unlock(); return memcg; @@ -3958,17 +3967,9 @@ int mem_cgroup_charge_file(struct page *page, struct mm_struct *mm, return 0; } - /* - * Page cache insertions can happen without an actual mm - * context, e.g. during disk probing on boot. - */ - if (unlikely(!mm)) - memcg = root_mem_cgroup; - else { - memcg = mem_cgroup_try_charge_mm(mm, gfp_mask, 1, true); - if (!memcg) - return -ENOMEM; - } + memcg = mem_cgroup_try_charge_mm(mm, gfp_mask, 1, true); + if (!memcg) + return -ENOMEM; __mem_cgroup_commit_charge(memcg, page, 1, type, false); return 0; } diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 35ef28acf137..9ccef39a9de2 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1081,15 +1081,16 @@ int memory_failure(unsigned long pfn, int trapno, int flags) return 0; } else if (PageHuge(hpage)) { /* - * Check "just unpoisoned", "filter hit", and - * "race with other subpage." + * Check "filter hit" and "race with other subpage." */ lock_page(hpage); - if (!PageHWPoison(hpage) - || (hwpoison_filter(p) && TestClearPageHWPoison(p)) - || (p != hpage && TestSetPageHWPoison(hpage))) { - atomic_long_sub(nr_pages, &num_poisoned_pages); - return 0; + if (PageHWPoison(hpage)) { + if ((hwpoison_filter(p) && TestClearPageHWPoison(p)) + || (p != hpage && TestSetPageHWPoison(hpage))) { + atomic_long_sub(nr_pages, &num_poisoned_pages); + unlock_page(hpage); + return 0; + } } set_page_hwpoison_huge_page(hpage); res = dequeue_hwpoisoned_huge_page(hpage); @@ -1152,6 +1153,8 @@ int memory_failure(unsigned long pfn, int trapno, int flags) */ if (!PageHWPoison(p)) { printk(KERN_ERR "MCE %#lx: just unpoisoned\n", pfn); + atomic_long_sub(nr_pages, &num_poisoned_pages); + put_page(hpage); res = 0; goto out; } diff --git a/mm/mremap.c b/mm/mremap.c index 0843feb66f3d..05f1180e9f21 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -194,10 +194,17 @@ unsigned long move_page_tables(struct vm_area_struct *vma, break; if (pmd_trans_huge(*old_pmd)) { int err = 0; - if (extent == HPAGE_PMD_SIZE) + if (extent == HPAGE_PMD_SIZE) { + VM_BUG_ON(vma->vm_file || !vma->anon_vma); + /* See comment in move_ptes() */ + if (need_rmap_locks) + anon_vma_lock_write(vma->anon_vma); err = move_huge_pmd(vma, new_vma, old_addr, new_addr, old_end, old_pmd, new_pmd); + if (need_rmap_locks) + anon_vma_unlock_write(vma->anon_vma); + } if (err > 0) { need_flush = true; continue; diff --git a/mm/percpu.c b/mm/percpu.c index 63e24fb4387b..2ddf9a990dbd 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -610,7 +610,7 @@ static struct pcpu_chunk *pcpu_alloc_chunk(void) chunk->map = pcpu_mem_zalloc(PCPU_DFL_MAP_ALLOC * sizeof(chunk->map[0])); if (!chunk->map) { - kfree(chunk); + pcpu_mem_free(chunk, pcpu_chunk_struct_size); return NULL; } |