If we found a page is in VOLATILE vma, hurry up discarding
instead of access bit check because it's very unlikey working set.
Next patch will use it.
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
---
mm/rmap.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/mm/rmap.c b/mm/rmap.c
index 402d9da..fea01cd 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -695,10 +695,12 @@ int page_referenced_one(struct page *page, struct vm_area_struct *vma,
if (!pte)
goto out;
- if (vma->vm_flags & VM_LOCKED) {
+ if ((vma->vm_flags & VM_LOCKED) ||
+ (vma->vm_flags & VM_VOLATILE)) {
pte_unmap_unlock(pte, ptl);
*mapcount = 0; /* break early from loop */
- *vm_flags |= VM_LOCKED;
+ *vm_flags |= (vma->vm_flags & VM_LOCKED ?
+ VM_LOCKED : VM_VOLATILE);
goto out;
}
--
1.7.9.5
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