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| author | Konstantin Khlebnikov <khlebnikov@openvz.org> | 2011-05-24 17:12:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 08:39:23 -0700 |
| commit | bd486285f24ac2fd1ff64688fb0729712c5712c4 (patch) | |
| tree | d0fde80eb5c05893ba3b624b8219436b3efb274a /mm/memory-failure.c | |
| parent | 700c2a46e88265326764197d5b8842490bae5569 (diff) | |
| download | linux-stable-bd486285f24ac2fd1ff64688fb0729712c5712c4.tar.gz linux-stable-bd486285f24ac2fd1ff64688fb0729712c5712c4.tar.bz2 linux-stable-bd486285f24ac2fd1ff64688fb0729712c5712c4.zip | |
mem-hwpoison: fix page refcount around isolate_lru_page()
Drop first page reference only after calling isolate_lru_page() to keep
page stable reference while isolating.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 12178ec32ab5..369b80e81416 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1440,16 +1440,12 @@ int soft_offline_page(struct page *page, int flags) */ ret = invalidate_inode_page(page); unlock_page(page); - /* - * Drop count because page migration doesn't like raised - * counts. The page could get re-allocated, but if it becomes - * LRU the isolation will just fail. * RED-PEN would be better to keep it isolated here, but we * would need to fix isolation locking first. */ - put_page(page); if (ret == 1) { + put_page(page); ret = 0; pr_info("soft_offline: %#lx: invalidated\n", pfn); goto done; @@ -1461,6 +1457,11 @@ int soft_offline_page(struct page *page, int flags) * handles a large number of cases for us. */ ret = isolate_lru_page(page); + /* + * Drop page reference which is came from get_any_page() + * successful isolate_lru_page() already took another one. + */ + put_page(page); if (!ret) { LIST_HEAD(pagelist); |