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authorDmitry Monakhov <dmonakhov@openvz.org>2010-02-26 09:36:12 +0300
committerPekka Enberg <penberg@cs.helsinki.fi>2010-02-26 19:19:39 +0200
commit4c13dd3b48fcb6fbe44f241eb11a057ecd1cba75 (patch)
treed9875477b9eb48ad598da8cbc36b473c941828ae /Documentation/vm
parent60b341b778cc2929df16c0a504c91621b3c6a4ad (diff)
failslab: add ability to filter slab caches
This patch allow to inject faults only for specific slabs. In order to preserve default behavior cache filter is off by default (all caches are faulty). One may define specific set of slabs like this: # mark skbuff_head_cache as faulty echo 1 > /sys/kernel/slab/skbuff_head_cache/failslab # Turn on cache filter (off by default) echo 1 > /sys/kernel/debug/failslab/cache-filter # Turn on fault injection echo 1 > /sys/kernel/debug/failslab/times echo 1 > /sys/kernel/debug/failslab/probability Acked-by: David Rientjes <rientjes@google.com> Acked-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'Documentation/vm')
-rw-r--r--Documentation/vm/slub.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/vm/slub.txt b/Documentation/vm/slub.txt
index b37300edf27..07375e73981 100644
--- a/Documentation/vm/slub.txt
+++ b/Documentation/vm/slub.txt
@@ -41,6 +41,7 @@ Possible debug options are
P Poisoning (object and padding)
U User tracking (free and alloc)
T Trace (please only use on single slabs)
+ A Toggle failslab filter mark for the cache
O Switch debugging off for caches that would have
caused higher minimum slab orders
- Switch all debugging off (useful if the kernel is