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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-12-16 12:19:59 +0100 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-12-16 12:19:59 +0100 |
| commit | 7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4 (patch) | |
| tree | ac7f1e56551df46bc79e400a182a57f4eae5ddaf /mm/internal.h | |
| parent | 138ce286eb6ee6d39ca4fb50516e93adaf6b605f (diff) | |
| download | lwn-7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4.tar.gz lwn-7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4.zip | |
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.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 49b2ff776b78..814da335f050 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; |