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authorHaicheng Li <haicheng.li@linux.intel.com>2009-12-16 12:19:59 +0100
committerAndi Kleen <ak@linux.intel.com>2009-12-16 12:19:59 +0100
commit1bfe5febe34d2be2120803c10720e179186357c9 (patch)
treed4d8b1dacc375a1004ab1ed508333bc33e46d9a9 /mm/hwpoison-inject.c
parent4fd466eb46a6a917c317a87fb94bfc7252a0f7ed (diff)
downloadlinux-1bfe5febe34d2be2120803c10720e179186357c9.tar.gz
HWPOISON: add an interface to switch off/on all the page filters
In some use cases, user doesn't need extra filtering. E.g. user program can inject errors through madvise syscall to its own pages, however it might not know what the page state exactly is or which inode the page belongs to. So introduce an one-off interface "corrupt-filter-enable". Echo 0 to switch off page filters, and echo 1 to switch on the filters. [AK: changed default to 0] Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'mm/hwpoison-inject.c')
-rw-r--r--mm/hwpoison-inject.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index c838735ac31..c597f46ac18 100644
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -92,6 +92,11 @@ static int pfn_inject_init(void)
if (!dentry)
goto fail;
+ dentry = debugfs_create_u32("corrupt-filter-enable", 0600,
+ hwpoison_dir, &hwpoison_filter_enable);
+ if (!dentry)
+ goto fail;
+
dentry = debugfs_create_u32("corrupt-filter-dev-major", 0600,
hwpoison_dir, &hwpoison_filter_dev_major);
if (!dentry)