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Date: Tue, 23 Mar 2010 22:00:09 +0900 From: Akinobu Mita <akinobu.mita@...il.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org Subject: Re: [PATCH 12/12] add CPU notifier error injection module 2010/3/23 Andrew Morton <akpm@...ux-foundation.org>: > On Thu, 18 Mar 2010 18:05:24 +0900 > Akinobu Mita <akinobu.mita@...il.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? Yes. Thanks for spotting and fixing. And I had another typos in the above patch description: >> 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 # echo 0 > /sys/devices/system/cpu/cpu1/online (s/online0/online/) >> 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 Ditto. >> bash: echo: write error: No such file or directory -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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