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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 /Documentation/vm/hwpoison.txt
parent138ce286eb6ee6d39ca4fb50516e93adaf6b605f (diff)
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/hwpoison.txt')
-rw-r--r--Documentation/vm/hwpoison.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt
index f047e75acb2..fdf58046432 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