]> git.karo-electronics.de Git - karo-tx-linux.git/commit
[PATCH] fault-injection capability for alloc_pages()
authorAkinobu Mita <akinobu.mita@gmail.com>
Fri, 8 Dec 2006 10:39:45 +0000 (02:39 -0800)
committerLinus Torvalds <torvalds@woody.osdl.org>
Fri, 8 Dec 2006 16:29:02 +0000 (08:29 -0800)
commit933e312e73f8fc39652bd4d216a5393cc3a014b9
treea2aacc2a098c3c95fe5a94fef1a2cc9751bee79b
parent8a8b6502fb669c3a0638a08955442814cedc86b1
[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>
lib/Kconfig.debug
mm/page_alloc.c