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authorWu Fengguang <fengguang.wu@intel.com>2009-12-16 12:19:59 +0100
committerAndi Kleen <ak@linux.intel.com>2009-12-16 12:19:59 +0100
commit7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4 (patch)
treeac7f1e56551df46bc79e400a182a57f4eae5ddaf /mm/internal.h
parent138ce286eb6ee6d39ca4fb50516e93adaf6b605f (diff)
downloadvexpress-lsk-7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4.tar.gz
HWPOISON: add fs/device filters
Filesystem data/metadata present the most tricky-to-isolate pages. It requires careful code review and stress testing to get them right. The fs/device filter helps to target the stress tests to some specific filesystem pages. The filter condition is block device's major/minor numbers: - corrupt-filter-dev-major - corrupt-filter-dev-minor When specified (non -1), only page cache pages that belong to that device will be poisoned. The filters are checked reliably on the locked and refcounted page. Haicheng: clear PG_hwpoison and drop bad page count if filter not OK AK: Add documentation CC: Haicheng Li <haicheng.li@intel.com> CC: Nick Piggin <npiggin@suse.de> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 49b2ff776b7..814da335f05 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -250,3 +250,6 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
#define ZONE_RECLAIM_SOME 0
#define ZONE_RECLAIM_SUCCESS 1
#endif
+
+extern u32 hwpoison_filter_dev_major;
+extern u32 hwpoison_filter_dev_minor;