Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [RFC 3/8] bail out when the page is in VOLATILE vma | Date | Thu, 3 Jan 2013 13:28:01 +0900 |
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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@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Minchan Kim <minchan@kernel.org> --- 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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