Commit 0474a60e authored Dec 16, 2009 by Andi Kleen Committed by Andi Kleen Dec 16, 2009

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 <ak@linux.intel.com>

parent fe194d3e

mm/memory-failure.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -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;