ksm: fix mlockfreed to munlocked
authorHugh Dickins <hugh.dickins@tiscali.co.uk>
Tue, 15 Dec 2009 01:59:22 +0000 (17:59 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 15 Dec 2009 16:53:19 +0000 (08:53 -0800)
commit73848b4684e84a84cfd1555af78d41158f31e16b
treeb71ba30e2b20cbc45740a38e9b5aa51b8c2ea60e
parent08beca44dfb0ab008e365163df70dbd302ae1508
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>
mm/internal.h
mm/ksm.c
mm/mlock.c