Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [28/31] HWPOISON: Use new shake_page in memory_failure | Date | Tue, 8 Dec 2009 22:16:44 +0100 (CET) |
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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 <ak@linux.intel.com>
--- mm/memory-failure.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
Index: linux/mm/memory-failure.c =================================================================== --- linux.orig/mm/memory-failure.c +++ linux/mm/memory-failure.c @@ -934,8 +934,15 @@ int __memory_failure(unsigned long pfn, * 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;
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