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authorWu Fengguang <fengguang.wu@intel.com>2009-12-16 06:19:59 -0500
committerAndi Kleen <ak@linux.intel.com>2009-12-16 06:19:59 -0500
commit478c5ffc0b50527bd2390f2daa46cc16276b8413 (patch)
treef58f5be9760fd0e81567611cf6e9f9bc77d1d3cd /Documentation
parent1a9b5b7fe0c5dad8a635288882d36785dea742f9 (diff)
HWPOISON: add page flags filter
When specified, only poison pages if ((page_flags & mask) == value). - corrupt-filter-flags-mask - corrupt-filter-flags-value This allows stress testing of many kinds of pages. Strictly speaking, the buddy pages requires taking zone lock, to avoid setting PG_hwpoison on a "was buddy but now allocated to someone" page. However we can just do nothing because we set PG_locked in the beginning, this prevents the page allocator from allocating it to someone. (It will BUG() on the unexpected PG_locked, which is fine for hwpoison testing.) [AK: Add select PROC_PAGE_MONITOR to satisfy dependency] 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')
-rw-r--r--Documentation/vm/hwpoison.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt
index 4ef7bb30d15c..f454d3cd4d60 100644
--- a/Documentation/vm/hwpoison.txt
+++ b/Documentation/vm/hwpoison.txt
@@ -123,6 +123,16 @@ Only handle memory failures to pages associated with the file system defined
123by block device major/minor. -1U is the wildcard value. 123by block device major/minor. -1U is the wildcard value.
124This should be only used for testing with artificial injection. 124This should be only used for testing with artificial injection.
125 125
126
127corrupt-filter-flags-mask
128corrupt-filter-flags-value
129
130When specified, only poison pages if ((page_flags & mask) == value).
131This allows stress testing of many kinds of pages. The page_flags
132are the same as in /proc/kpageflags. The flag bits are defined in
133include/linux/kernel-page-flags.h and documented in
134Documentation/vm/pagemap.txt
135
126Architecture specific MCE injector 136Architecture specific MCE injector
127 137
128x86 has mce-inject, mce-test 138x86 has mce-inject, mce-test