path: root/mm/hwpoison-inject.c
diff options
authorWu Fengguang <>2009-12-16 12:19:59 +0100
committerAndi Kleen <>2009-12-16 12:19:59 +0100
commit7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4 (patch)
treeac7f1e56551df46bc79e400a182a57f4eae5ddaf /mm/hwpoison-inject.c
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 <> CC: Nick Piggin <> Signed-off-by: Wu Fengguang <> Signed-off-by: Andi Kleen <>
Diffstat (limited to 'mm/hwpoison-inject.c')
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index 6e35e563bf50..ac692a9b766c 100644
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -3,6 +3,7 @@
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include "internal.h"
static struct dentry *hwpoison_dir;
@@ -54,6 +55,16 @@ static int pfn_inject_init(void)
if (!dentry)
goto fail;
+ dentry = debugfs_create_u32("corrupt-filter-dev-major", 0600,
+ hwpoison_dir, &hwpoison_filter_dev_major);
+ if (!dentry)
+ goto fail;
+ dentry = debugfs_create_u32("corrupt-filter-dev-minor", 0600,
+ hwpoison_dir, &hwpoison_filter_dev_minor);
+ if (!dentry)
+ goto fail;
return 0;