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 <[email protected]> Cc: Mel Gorman <[email protected]> Signed-off-by: Minchan Kim <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
