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| author | Hugh Dickins | 2009-12-15 02:59:22 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2009-12-15 17:53:19 +0100 |
| commit | 73848b4684e84a84cfd1555af78d41158f31e16b (patch) | |
| tree | b71ba30e2b20cbc45740a38e9b5aa51b8c2ea60e /mm/ksm.c | |
| parent | ksm: stable_node point to page and back (diff) | |
| download | kernel-qcow2-linux-73848b4684e84a84cfd1555af78d41158f31e16b.tar.gz kernel-qcow2-linux-73848b4684e84a84cfd1555af78d41158f31e16b.tar.xz kernel-qcow2-linux-73848b4684e84a84cfd1555af78d41158f31e16b.zip | |
ksm: fix mlockfreed to munlocked
When KSM merges an mlocked page, it has been forgetting to munlock it:
that's been left to free_page_mlock(), which reports it in /proc/vmstat as
unevictable_pgs_mlockfreed instead of unevictable_pgs_munlocked (and
whinges "Page flag mlocked set for process" in mmotm, whereas mainline is
silently forgiving). Call munlock_vma_page() to fix that.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Izik Eidus <ieidus@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/ksm.c')
| -rw-r--r-- | mm/ksm.c | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -34,6 +34,7 @@ #include <linux/ksm.h> #include <asm/tlbflush.h> +#include "internal.h" /* * A few notes about the KSM scanning process, @@ -762,6 +763,9 @@ static int try_to_merge_one_page(struct vm_area_struct *vma, pages_identical(page, kpage)) err = replace_page(vma, page, kpage, orig_pte); + if ((vma->vm_flags & VM_LOCKED) && !err) + munlock_vma_page(page); + unlock_page(page); out: return err; |