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author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/mm/failslab.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/mm/failslab.c')
-rw-r--r-- | kernel/mm/failslab.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/kernel/mm/failslab.c b/kernel/mm/failslab.c new file mode 100644 index 000000000..fefaabaab --- /dev/null +++ b/kernel/mm/failslab.c @@ -0,0 +1,60 @@ +#include <linux/fault-inject.h> +#include <linux/slab.h> + +static struct { + struct fault_attr attr; + u32 ignore_gfp_wait; + int cache_filter; +} failslab = { + .attr = FAULT_ATTR_INITIALIZER, + .ignore_gfp_wait = 1, + .cache_filter = 0, +}; + +bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags) +{ + if (gfpflags & __GFP_NOFAIL) + return false; + + 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); +} + +static int __init setup_failslab(char *str) +{ + return setup_fault_attr(&failslab.attr, str); +} +__setup("failslab=", setup_failslab); + +#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS +static int __init failslab_debugfs_init(void) +{ + struct dentry *dir; + umode_t mode = S_IFREG | S_IRUSR | S_IWUSR; + + dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr); + if (IS_ERR(dir)) + return PTR_ERR(dir); + + if (!debugfs_create_bool("ignore-gfp-wait", mode, dir, + &failslab.ignore_gfp_wait)) + goto fail; + if (!debugfs_create_bool("cache-filter", mode, dir, + &failslab.cache_filter)) + goto fail; + + return 0; +fail: + debugfs_remove_recursive(dir); + + return -ENOMEM; +} + +late_initcall(failslab_debugfs_init); + +#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ |