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mm: page_alloc: use word-based accesses for get/set pageblock bitmaps
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
mm
/
rmap.c
diff --git
a/mm/rmap.c
b/mm/rmap.c
index
8fc049f
..
5d91bb7
100644
(file)
--- a/
mm/rmap.c
+++ b/
mm/rmap.c
@@
-1322,9
+1322,19
@@
static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount,
BUG_ON(!page || PageAnon(page));
if (locked_vma) {
BUG_ON(!page || PageAnon(page));
if (locked_vma) {
- mlock_vma_page(page); /* no-op if already mlocked */
- if (page == check_page)
+ if (page == check_page) {
+ /* we know we have check_page locked */
+ mlock_vma_page(page);
ret = SWAP_MLOCK;
ret = SWAP_MLOCK;
+ } else if (trylock_page(page)) {
+ /*
+ * If we can lock the page, perform mlock.
+ * Otherwise leave the page alone, it will be
+ * eventually encountered again later.
+ */
+ mlock_vma_page(page);
+ unlock_page(page);
+ }
continue; /* don't unmap */
}
continue; /* don't unmap */
}
@@
-1544,10
+1554,9
@@
void __put_anon_vma(struct anon_vma *anon_vma)
{
struct anon_vma *root = anon_vma->root;
{
struct anon_vma *root = anon_vma->root;
+ anon_vma_free(anon_vma);
if (root != anon_vma && atomic_dec_and_test(&root->refcount))
anon_vma_free(root);
if (root != anon_vma && atomic_dec_and_test(&root->refcount))
anon_vma_free(root);
-
- anon_vma_free(anon_vma);
}
static struct anon_vma *rmap_walk_anon_lock(struct page *page,
}
static struct anon_vma *rmap_walk_anon_lock(struct page *page,