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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2006-12-08 02:39:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 08:29:02 -0800 |
| commit | 933e312e73f8fc39652bd4d216a5393cc3a014b9 (patch) | |
| tree | a2aacc2a098c3c95fe5a94fef1a2cc9751bee79b /lib/Kconfig.debug | |
| parent | 8a8b6502fb669c3a0638a08955442814cedc86b1 (diff) | |
| download | lwn-933e312e73f8fc39652bd4d216a5393cc3a014b9.tar.gz lwn-933e312e73f8fc39652bd4d216a5393cc3a014b9.zip | |
[PATCH] fault-injection capability for alloc_pages()
This patch provides fault-injection capability for alloc_pages()
Boot option:
fail_page_alloc=<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 pages.
<times> -- specifies how many times failures may happen at most.
Debugfs:
/debug/fail_page_alloc/interval
/debug/fail_page_alloc/probability
/debug/fail_page_alloc/specifies
/debug/fail_page_alloc/times
/debug/fail_page_alloc/ignore-gfp-highmem
/debug/fail_page_alloc/ignore-gfp-wait
Example:
fail_page_alloc=10,100,0,-1
The page allocation (alloc_pages(), ...) fails once per 10 times.
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 c7f567a57d7d..c66b7b400c9f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -424,6 +424,13 @@ config FAILSLAB help This option provides fault-injection capabilitiy for kmalloc. +config FAIL_PAGE_ALLOC + bool "Fault-injection capabilitiy for alloc_pages()" + depends on DEBUG_KERNEL + select FAULT_INJECTION + help + This option provides fault-injection capabilitiy for alloc_pages(). + config FAULT_INJECTION_DEBUG_FS bool "Debugfs entries for fault-injection capabilities" depends on FAULT_INJECTION && SYSFS |