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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2006-12-08 02:39:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 08:29:02 -0800 |
| commit | 8a8b6502fb669c3a0638a08955442814cedc86b1 (patch) | |
| tree | 2e49652f904eb821f2fa7ae8cab0dd9b756772d9 /lib/Kconfig.debug | |
| parent | 6ff1cb355e628f8fc55fa2d01e269e5e1bbc2fe9 (diff) | |
| download | lwn-8a8b6502fb669c3a0638a08955442814cedc86b1.tar.gz lwn-8a8b6502fb669c3a0638a08955442814cedc86b1.zip | |
[PATCH] fault-injection capability for kmalloc
This patch provides fault-injection capability for kmalloc.
Boot option:
failslab=<interval>,<probability>,<space>,<times>
<interval> -- specifies the interval of failures.
<probability> -- specifies how often it should fail in percent.
<space> -- specifies the size of free space where memory can be
allocated safely in bytes.
<times> -- specifies how many times failures may happen at most.
Debugfs:
/debug/failslab/interval
/debug/failslab/probability
/debug/failslab/specifies
/debug/failslab/times
/debug/failslab/ignore-gfp-highmem
/debug/failslab/ignore-gfp-wait
Example:
failslab=10,100,0,-1
slab allocation (kmalloc(), kmem_cache_alloc(),..) fails once per 10 times.
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 35228b3e7e92..c7f567a57d7d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -417,6 +417,13 @@ config LKDTM config FAULT_INJECTION bool +config FAILSLAB + bool "Fault-injection capabilitiy for kmalloc" + depends on DEBUG_KERNEL + select FAULT_INJECTION + help + This option provides fault-injection capabilitiy for kmalloc. + config FAULT_INJECTION_DEBUG_FS bool "Debugfs entries for fault-injection capabilities" depends on FAULT_INJECTION && SYSFS |