Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [2/31] HWPOISON: Be more aggressive at freeing non LRU caches | Date | Tue, 8 Dec 2009 22:16:18 +0100 (CET) |
| |
shake_page handles more types of page caches than lru_drain_all()
- per cpu page allocator pages - per CPU LRU
Stops early when the page became free.
Used in followon patches.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- include/linux/mm.h | 1 + mm/memory-failure.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+)
Index: linux/mm/memory-failure.c =================================================================== --- linux.orig/mm/memory-failure.c +++ linux/mm/memory-failure.c @@ -83,6 +83,28 @@ static int kill_proc_ao(struct task_stru } /* + * When a unknown page type is encountered drain as many buffers as possible + * in the hope to turn the page into a LRU or free page, which we can handle. + */ +void shake_page(struct page *p) +{ + if (!PageSlab(p)) { + lru_add_drain_all(); + if (PageLRU(p)) + return; + drain_all_pages(); + if (PageLRU(p) || is_free_buddy_page(p)) + return; + } + /* + * Could call shrink_slab here (which would also + * shrink other caches). Unfortunately that might + * also access the corrupted page, which could be fatal. + */ +} +EXPORT_SYMBOL_GPL(shake_page); + +/* * Kill all processes that have a poisoned page mapped and then isolate * the page. * Index: linux/include/linux/mm.h =================================================================== --- linux.orig/include/linux/mm.h +++ linux/include/linux/mm.h @@ -1320,6 +1320,7 @@ extern void memory_failure(unsigned long extern int __memory_failure(unsigned long pfn, int trapno, int ref); extern int sysctl_memory_failure_early_kill; extern int sysctl_memory_failure_recovery; +extern void shake_page(struct page *p); extern atomic_long_t mce_bad_pages; #endif /* __KERNEL__ */
| |