linux-kernel - Re: [PATCH] Provide ways of crashing the kernel through debugfs

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Message-ID: <20100126111853.10890fc6@marrow.netinsight.se>
Date:	Tue, 26 Jan 2010 11:18:53 +0100
From:	Simon Kagstrom <simon.kagstrom@...insight.net>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	Artem Bityutskiy <dedekind1@...il.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] Provide ways of crashing the kernel through debugfs

Hi Americo!

On Tue, 26 Jan 2010 18:08:28 +0800
Américo Wang <xiyou.wangcong@...il.com> wrote:

> On Tue, Jan 26, 2010 at 5:56 PM, Simon Kagstrom
> <simon.kagstrom@...insight.net> wrote:
> > For development and testing it's sometimes useful to crash or injure the
> > kernel in various ways. This patch adds a debugfs interface to provoke
> > null-pointer dereferences, stack corruption, panics, bugons etc. For
> > example:
> >
> >  mount -t debugfs debugfs /mnt
> >  echo 1 > /mnt/provoke-crash/null_dereference
> >
> > Signed-off-by: Simon Kagstrom <simon.kagstrom@...insight.net>
> > ---
> > Obviously this feature is for debugging and testing only, and of
> > interest to fairly few people. I've used it for testing the kmsg_dump
> > stuff (hence the CC:s above) and kdump, and have found it fairly useful.
> >
> > If it's not of interest, at least this mail will be in the archives if
> > someone else needs something like it :-)
> 
> Hey, we already have /proc/sysrq-trigger, you need to state why
> it is better than using /proc/sysrq-trigger.

Well, it provides a few more ways of crashing the kernel. That's
basically the only additional feature you'll get.

// Simon
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