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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-12-16 14:19:59 +0300 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-12-16 14:19:59 +0300 |
| commit | 7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4 (patch) | |
| tree | ac7f1e56551df46bc79e400a182a57f4eae5ddaf /Documentation/vm | |
| parent | 138ce286eb6ee6d39ca4fb50516e93adaf6b605f (diff) | |
| download | linux-7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4.tar.xz | |
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 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/hwpoison.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt index f047e75acb23..fdf580464324 100644 --- a/Documentation/vm/hwpoison.txt +++ b/Documentation/vm/hwpoison.txt @@ -115,6 +115,13 @@ memory failures. Note these injection interfaces are not stable and might change between kernel versions +corrupt-filter-dev-major +corrupt-filter-dev-minor + +Only handle memory failures to pages associated with the file system defined +by block device major/minor. -1U is the wildcard value. +This should be only used for testing with artificial injection. + Architecture specific MCE injector x86 has mce-inject, mce-test |