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Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c51
1 files changed, 31 insertions, 20 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 1311dc4a3888..1f6ff9c1bbc3 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -187,12 +187,13 @@ static int is_valid_nodemask(nodemask_t *nodemask)
}
/* Create a new policy */
-static struct mempolicy *mpol_new(unsigned short mode, nodemask_t *nodes)
+static struct mempolicy *mpol_new(unsigned short mode, unsigned short flags,
+ nodemask_t *nodes)
{
struct mempolicy *policy;
- pr_debug("setting mode %d nodes[0] %lx\n",
- mode, nodes ? nodes_addr(*nodes)[0] : -1);
+ pr_debug("setting mode %d flags %d nodes[0] %lx\n",
+ mode, flags, nodes ? nodes_addr(*nodes)[0] : -1);
if (mode == MPOL_DEFAULT)
return NULL;
@@ -224,6 +225,7 @@ static struct mempolicy *mpol_new(unsigned short mode, nodemask_t *nodes)
BUG();
}
policy->policy = mode;
+ policy->flags = flags;
policy->cpuset_mems_allowed = cpuset_mems_allowed(current);
return policy;
}
@@ -466,13 +468,14 @@ static void mpol_set_task_struct_flag(void)
}
/* Set the process memory policy */
-static long do_set_mempolicy(unsigned short mode, nodemask_t *nodes)
+static long do_set_mempolicy(unsigned short mode, unsigned short flags,
+ nodemask_t *nodes)
{
struct mempolicy *new;
if (mpol_check_policy(mode, nodes))
return -EINVAL;
- new = mpol_new(mode, nodes);
+ new = mpol_new(mode, flags, nodes);
if (IS_ERR(new))
return PTR_ERR(new);
mpol_free(current->mempolicy);
@@ -573,7 +576,7 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask,
goto out;
}
} else
- *policy = pol->policy;
+ *policy = pol->policy | pol->flags;
if (vma) {
up_read(&current->mm->mmap_sem);
@@ -763,8 +766,8 @@ static struct page *new_vma_page(struct page *page, unsigned long private, int *
#endif
static long do_mbind(unsigned long start, unsigned long len,
- unsigned short mode, nodemask_t *nmask,
- unsigned long flags)
+ unsigned short mode, unsigned short mode_flags,
+ nodemask_t *nmask, unsigned long flags)
{
struct vm_area_struct *vma;
struct mm_struct *mm = current->mm;
@@ -796,7 +799,7 @@ static long do_mbind(unsigned long start, unsigned long len,
if (mpol_check_policy(mode, nmask))
return -EINVAL;
- new = mpol_new(mode, nmask);
+ new = mpol_new(mode, mode_flags, nmask);
if (IS_ERR(new))
return PTR_ERR(new);
@@ -807,8 +810,9 @@ static long do_mbind(unsigned long start, unsigned long len,
if (!new)
flags |= MPOL_MF_DISCONTIG_OK;
- pr_debug("mbind %lx-%lx mode:%d nodes:%lx\n", start, start + len,
- mode, nmask ? nodes_addr(*nmask)[0] : -1);
+ pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx\n",
+ start, start + len, mode, mode_flags,
+ nmask ? nodes_addr(*nmask)[0] : -1);
down_write(&mm->mmap_sem);
vma = check_range(mm, start, end, nmask,
@@ -907,13 +911,16 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len,
{
nodemask_t nodes;
int err;
+ unsigned short mode_flags;
+ mode_flags = mode & MPOL_MODE_FLAGS;
+ mode &= ~MPOL_MODE_FLAGS;
if (mode >= MPOL_MAX)
return -EINVAL;
err = get_nodes(&nodes, nmask, maxnode);
if (err)
return err;
- return do_mbind(start, len, mode, &nodes, flags);
+ return do_mbind(start, len, mode, mode_flags, &nodes, flags);
}
/* Set the process memory policy */
@@ -922,13 +929,16 @@ asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
{
int err;
nodemask_t nodes;
+ unsigned short flags;
- if (mode < 0 || mode >= MPOL_MAX)
+ flags = mode & MPOL_MODE_FLAGS;
+ mode &= ~MPOL_MODE_FLAGS;
+ if ((unsigned int)mode >= MPOL_MAX)
return -EINVAL;
err = get_nodes(&nodes, nmask, maxnode);
if (err)
return err;
- return do_set_mempolicy(mode, &nodes);
+ return do_set_mempolicy(mode, flags, &nodes);
}
asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
@@ -1641,7 +1651,7 @@ restart:
}
void mpol_shared_policy_init(struct shared_policy *info, unsigned short policy,
- nodemask_t *policy_nodes)
+ unsigned short flags, nodemask_t *policy_nodes)
{
info->root = RB_ROOT;
spin_lock_init(&info->lock);
@@ -1650,7 +1660,7 @@ void mpol_shared_policy_init(struct shared_policy *info, unsigned short policy,
struct mempolicy *newpol;
/* Falls back to MPOL_DEFAULT on any error */
- newpol = mpol_new(policy, policy_nodes);
+ newpol = mpol_new(policy, flags, policy_nodes);
if (!IS_ERR(newpol)) {
/* Create pseudo-vma that contains just the policy */
struct vm_area_struct pvma;
@@ -1671,9 +1681,10 @@ int mpol_set_shared_policy(struct shared_policy *info,
struct sp_node *new = NULL;
unsigned long sz = vma_pages(vma);
- pr_debug("set_shared_policy %lx sz %lu %d %lx\n",
+ pr_debug("set_shared_policy %lx sz %lu %d %d %lx\n",
vma->vm_pgoff,
- sz, npol? npol->policy : -1,
+ sz, npol ? npol->policy : -1,
+ npol ? npol->flags : -1,
npol ? nodes_addr(npol->v.nodes)[0] : -1);
if (npol) {
@@ -1746,14 +1757,14 @@ void __init numa_policy_init(void)
if (unlikely(nodes_empty(interleave_nodes)))
node_set(prefer, interleave_nodes);
- if (do_set_mempolicy(MPOL_INTERLEAVE, &interleave_nodes))
+ if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes))
printk("numa_policy_init: interleaving failed\n");
}
/* Reset policy of current process to default */
void numa_default_policy(void)
{
- do_set_mempolicy(MPOL_DEFAULT, NULL);
+ do_set_mempolicy(MPOL_DEFAULT, 0, NULL);
}
/* Migrate a policy to a different set of nodes */
generated by cgit v1.2.3 (git 2.0.4) at 2025-01-01 00:23:03 +0000