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mlock: count attempts to free mlocked page

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Allow free of mlock()ed pages.  This shouldn't happen, but during
developement, it occasionally did.

This patch allows us to survive that condition, while keeping the
statistics and events correct for debug.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lee Schermerhorn 2008-10-18 20:26:53 -07:00 • committed by Linus Torvalds
parent af936a1606
commit 985737cf2e
4 changed files with 20 additions and 0 deletions
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1
mm/page_alloc.c
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@ -454,6 +454,7 @@ static inline void __free_one_page(struct page *page,
static inline int free_pages_check(struct page *page)
{
free_page_mlock(page);
if (unlikely(page_mapcount(page) |
(page->mapping != NULL) |
(page_get_page_cgroup(page) != NULL) |