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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2012-07-31 01:43:10 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 04:25:22 +0400 |
| commit | 9579f5bd31a04e80a87a7b58bd52dff6dc68bc99 (patch) | |
| tree | a574a53f7829f157ef9ce2b696cc66ffe92bcef9 /block/blk-core.c | |
| parent | 048b9c3549790af21eabd06a5ebdad305e75b1c5 (diff) | |
| download | linux-9579f5bd31a04e80a87a7b58bd52dff6dc68bc99.tar.xz | |
memory: memory notifier error injection module
This provides the ability to inject artifical errors to memory hotplug
notifier chain callbacks. It is controlled through debugfs interface
under /sys/kernel/debug/notifier-error-inject/memory
If the notifier call chain should be failed with some events notified,
write the error code to "actions/<notifier event>/error".
Example: Inject memory hotplug offline error (-12 == -ENOMEM)
# cd /sys/kernel/debug/notifier-error-inject/memory
# echo -12 > actions/MEM_GOING_OFFLINE/error
# echo offline > /sys/devices/system/memory/memoryXXX/state
bash: echo: write error: Cannot allocate memory
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Greg KH <greg@kroah.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blk-core.c')
0 files changed, 0 insertions, 0 deletions