diff options
| -rw-r--r-- | mm/failslab.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/failslab.c b/mm/failslab.c index 0dd7b8fec71c..49598688c44f 100644 --- a/mm/failslab.c +++ b/mm/failslab.c @@ -5,14 +5,29 @@ static struct { struct fault_attr attr; u32 ignore_gfp_wait; int cache_filter; + u32 size; } failslab = { .attr = FAULT_ATTR_INITIALIZER, .ignore_gfp_wait = 1, .cache_filter = 0, + .size = 0, }; +static void fail_dump(struct fault_attr *attr) +{ + if (attr->verbose > 0) + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); + if (attr->verbose > 1) + dump_stack(); +} + bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags) { + if (failslab.size && size > failslab.size) { + fail_dump(&failslab.attr); + return true; + } + if (gfpflags & __GFP_NOFAIL) return false; @@ -48,6 +63,10 @@ static int __init failslab_debugfs_init(void) &failslab.cache_filter)) goto fail; + if (!debugfs_create_u32("size", mode, dir, + &failslab.size)) + goto fail; + return 0; fail: debugfs_remove_recursive(dir); |