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Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 20d5ad39fa4..30bdafba52d 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -429,6 +429,19 @@ static int contextualize_policy(int mode, nodemask_t *nodes)
return mpol_check_policy(mode, nodes);
}
+static int swap_pages(struct list_head *pagelist)
+{
+ LIST_HEAD(moved);
+ LIST_HEAD(failed);
+ int n;
+
+ n = migrate_pages(pagelist, NULL, &moved, &failed);
+ putback_lru_pages(&failed);
+ putback_lru_pages(&moved);
+
+ return n;
+}
+
long do_mbind(unsigned long start, unsigned long len,
unsigned long mode, nodemask_t *nmask, unsigned long flags)
{
@@ -481,10 +494,13 @@ long do_mbind(unsigned long start, unsigned long len,
(flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) ? &pagelist : NULL);
err = PTR_ERR(vma);
if (!IS_ERR(vma)) {
+ int nr_failed = 0;
+
err = mbind_range(vma, start, end, new);
if (!list_empty(&pagelist))
- migrate_pages(&pagelist, NULL);
- if (!err && !list_empty(&pagelist) && (flags & MPOL_MF_STRICT))
+ nr_failed = swap_pages(&pagelist);
+
+ if (!err && nr_failed && (flags & MPOL_MF_STRICT))
err = -EIO;
}
if (!list_empty(&pagelist))
@@ -635,11 +651,12 @@ int do_migrate_pages(struct mm_struct *mm,
down_read(&mm->mmap_sem);
check_range(mm, mm->mmap->vm_start, TASK_SIZE, &nodes,
flags | MPOL_MF_DISCONTIG_OK, &pagelist);
+
if (!list_empty(&pagelist)) {
- migrate_pages(&pagelist, NULL);
- if (!list_empty(&pagelist))
- count = putback_lru_pages(&pagelist);
+ count = swap_pages(&pagelist);
+ putback_lru_pages(&pagelist);
}
+
up_read(&mm->mmap_sem);
return count;
}