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authorAkinobu Mita <akinobu.mita@gmail.com>2006-12-08 02:39:46 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:29:02 -0800
commitc17bb4951752d3e0f49cd1ea9d2e868422f9e0d6 (patch)
treedcd23ef706ba09edae462528dc11a507b1d17af6 /lib/fault-inject.c
parent933e312e73f8fc39652bd4d216a5393cc3a014b9 (diff)
downloadlinux-linaro-stable-c17bb4951752d3e0f49cd1ea9d2e868422f9e0d6.tar.gz
[PATCH] fault-injection capability for disk IO
This patch provides fault-injection capability for disk IO. Boot option: fail_make_request=<probability>,<interval>,<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 disk IO can be issued safely in bytes. <times> -- specifies how many times failures may happen at most. Debugfs: /debug/fail_make_request/interval /debug/fail_make_request/probability /debug/fail_make_request/specifies /debug/fail_make_request/times Example: fail_make_request=10,100,0,-1 echo 1 > /sys/blocks/hda/hda1/make-it-fail generic_make_request() on /dev/hda1 fails once per 10 times. Cc: Jens Axboe <axboe@suse.de> 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>
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