summaryrefslogtreecommitdiff
path: root/mm/failslab.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/failslab.c')
-rw-r--r--mm/failslab.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/mm/failslab.c b/mm/failslab.c
index 9339de5f0a91..c5f88f240ddc 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -1,18 +1,21 @@
#include <linux/fault-inject.h>
-#include <linux/gfp.h>
+#include <linux/slab.h>
static struct {
struct fault_attr attr;
u32 ignore_gfp_wait;
+ int cache_filter;
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
struct dentry *ignore_gfp_wait_file;
+ struct dentry *cache_filter_file;
#endif
} failslab = {
.attr = FAULT_ATTR_INITIALIZER,
.ignore_gfp_wait = 1,
+ .cache_filter = 0,
};
-bool should_failslab(size_t size, gfp_t gfpflags)
+bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags)
{
if (gfpflags & __GFP_NOFAIL)
return false;
@@ -20,6 +23,9 @@ bool should_failslab(size_t size, gfp_t gfpflags)
if (failslab.ignore_gfp_wait && (gfpflags & __GFP_WAIT))
return false;
+ if (failslab.cache_filter && !(cache_flags & SLAB_FAILSLAB))
+ return false;
+
return should_fail(&failslab.attr, size);
}
@@ -30,7 +36,6 @@ static int __init setup_failslab(char *str)
__setup("failslab=", setup_failslab);
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
static int __init failslab_debugfs_init(void)
{
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
@@ -46,8 +51,14 @@ static int __init failslab_debugfs_init(void)
debugfs_create_bool("ignore-gfp-wait", mode, dir,
&failslab.ignore_gfp_wait);
- if (!failslab.ignore_gfp_wait_file) {
+ failslab.cache_filter_file =
+ debugfs_create_bool("cache-filter", mode, dir,
+ &failslab.cache_filter);
+
+ if (!failslab.ignore_gfp_wait_file ||
+ !failslab.cache_filter_file) {
err = -ENOMEM;
+ debugfs_remove(failslab.cache_filter_file);
debugfs_remove(failslab.ignore_gfp_wait_file);
cleanup_fault_attr_dentries(&failslab.attr);
}