linux-kernel - Re: [PATCH v2 0/5] notifier error injection

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Date:	Fri, 22 Jul 2011 13:49:09 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/5] notifier error injection

2011/7/22 Andrew Morton <akpm@...ux-foundation.org>:
> On Mon, 18 Jul 2011 10:16:01 +0900
> Akinobu Mita <akinobu.mita@...il.com> wrote:
>
>> This provides the ability to inject artifical errors to the following
>> notifier chain callbacks. It is useful to test the error handling of
>> notifier call chain failures.
>
> That all looks very nice, but I wonder how many people are actually
> using these things.  The injection framework itself doesn't seem to
> have had a lot of uptake.
>
> I wonder if we could improve things by adding an easy-to-run testing
> script which identifies all the available error-injection inputs,
> exercises them and then reports on the result?
>
> Such a script would logically reside under ./tests/fault-injection/,
> but we still don't have a tests/ directory.  Which perhaps tells us
> something ;)

Sounds goood. I'll create shell script that detects hot-pluggable CPU
or memory block and runs quick tests.

BTW, the patchset has been rewritten to be kernel modules rather than
initializing at late_initcall()s.  The reason for switching to kernel
modules is to provide an easy way to specify notifier priority as
module parameter.  I'll send newer patchset soon.
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