From: Andrew Morton <akpm@linux-foundation.org>
To: Akinobu Mita <akinobu.mita@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 12/12] add CPU notifier error injection module
Date: Mon, 22 Mar 2010 14:48:09 -0700 [thread overview]
Message-ID: <20100322144809.4d54bc7e.akpm@linux-foundation.org> (raw)
In-Reply-To: <1268903124-10237-12-git-send-email-akinobu.mita@gmail.com>
On Thu, 18 Mar 2010 18:05:24 +0900
Akinobu Mita <akinobu.mita@gmail.com> wrote:
> I used this module to test the series of modification to the
> cpu notifiers code.
>
> Example1: inject CPU offline error (-1 == -EPERM)
>
> # modprobe cpu-notifier-error-inject cpu_down_prepare_error=-1
> # echo 0 > /sys/devices/system/cpu/cpu1/online0
> bash: echo: write error: Operation not permitted
>
> Example2: inject CPU online error (-2 == -ENOENT)
>
> # modprobe cpu-notifier-error-inject cpu_up_prepare_error=-2
> # echo 1 > /sys/devices/system/cpu/cpu1/online0
> bash: echo: write error: No such file or directory
>
> ...
>
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -885,6 +885,18 @@ config LKDTM
> Documentation on how to use the module can be found in
> Documentation/fault-injection/provoke-crashes.txt
>
> +config CPU_NOTIFIER_ERROR_INJECT
> + tristate "CPU notifier error injection module"
> + depends on HOTPLUG_CPU && DEBUG_KERNEL
> + help
> + This option provides a kernel module that can be used to test
> + the error handling of the cpu notifiers
> +
> + To compile this code as a module, choose M here: the module will
> + be called cpu-notify-inject.
Should be "cpu-notifier-error-inject", yes?
> + If unsure, say N.
> +
> config FAULT_INJECTION
> bool "Fault-injection framework"
> depends on DEBUG_KERNEL
next prev parent reply other threads:[~2010-03-22 21:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-18 9:05 [PATCH 01/12] cpu-hotplug: introduce cpu_notify(), __cpu_notify(), cpu_notify_nofail() Akinobu Mita
2010-03-18 9:05 ` [PATCH 02/12] cpu-hotplug: return better errno on cpu hotplug failure Akinobu Mita
2010-03-18 9:05 ` [PATCH 03/12] notifier: change notifier_from_errno(0) to return NOTIFY_OK Akinobu Mita
2010-03-18 9:05 ` [PATCH 04/12] x86: convert cpu notifier to return encapsulate errno value Akinobu Mita
2010-03-18 9:05 ` [PATCH 05/12] topology: " Akinobu Mita
2010-03-18 9:05 ` [PATCH 06/12] kernel/: " Akinobu Mita
2010-03-18 9:05 ` [PATCH 07/12] slab: " Akinobu Mita
2010-03-18 17:21 ` Pekka Enberg
2010-03-18 9:05 ` [PATCH 08/12] iucv: " Akinobu Mita
2010-03-18 9:05 ` [PATCH 09/12] ehca: " Akinobu Mita
2010-03-29 8:47 ` Alexander Schmidt
2010-03-18 9:05 ` [PATCH 10/12] s390: " Akinobu Mita
2010-03-18 9:05 ` [PATCH 11/12] md: " Akinobu Mita
2010-03-18 9:05 ` [PATCH 12/12] add CPU notifier error injection module Akinobu Mita
2010-03-22 21:48 ` Andrew Morton [this message]
2010-03-23 13:00 ` Akinobu Mita
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