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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 | 478c5ffc0b50527bd2390f2daa46cc16276b8413 (patch) | |
| tree | f58f5be9760fd0e81567611cf6e9f9bc77d1d3cd /mm/internal.h | |
| parent | mm: export stable page flags (diff) | |
| download | linux-478c5ffc0b50527bd2390f2daa46cc16276b8413.tar.xz linux-478c5ffc0b50527bd2390f2daa46cc16276b8413.zip | |
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 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 04bbce8b8ba6..b2027c73119b 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -255,3 +255,5 @@ extern int hwpoison_filter(struct page *p); extern u32 hwpoison_filter_dev_major; extern u32 hwpoison_filter_dev_minor; +extern u64 hwpoison_filter_flags_mask; +extern u64 hwpoison_filter_flags_value; |