From 0474a60ec704324577782b1057d05b574388d552 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 16 Dec 2009 12:20:00 +0100 Subject: [PATCH] HWPOISON: Use new shake_page in memory_failure shake_page handles more types of page caches than the much simpler lru_add_drain_all: - slab (quite inefficiently for now) - any other caches with a shrinker callback - per cpu page allocator pages - per CPU LRU Use this call to try to turn pages into free or LRU pages. Then handle the case of the page becoming free after drain everything. Signed-off-by: Andi Kleen --- mm/memory-failure.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 2d5f1223bf4d..ded1d387b4c5 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -936,8 +936,15 @@ int __memory_failure(unsigned long pfn, int trapno, int flags) * walked by the page reclaim code, however that's not a big loss. */ if (!PageLRU(p)) - lru_add_drain_all(); + shake_page(p); if (!PageLRU(p)) { + /* + * shake_page could have turned it free. + */ + if (is_free_buddy_page(p)) { + action_result(pfn, "free buddy, 2nd try", DELAYED); + return 0; + } action_result(pfn, "non LRU", IGNORED); put_page(p); return -EBUSY; -- GitLab