From: Dave Jones <davej@redhat.com>
To: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: netconsole module cannot be removed
Date: Mon, 26 Feb 2007 16:42:29 -0500 [thread overview]
Message-ID: <20070226214229.GA9797@redhat.com> (raw)
In-Reply-To: <20070226133156.3bfd2a74@freekitty>
On Mon, Feb 26, 2007 at 01:31:56PM -0800, Stephen Hemminger wrote:
> On Mon, 26 Feb 2007 15:35:11 -0500
> Chuck Ebbert <cebbert@redhat.com> wrote:
>
> > Trying to remove netconsole, rmmod goes into a tight loop with
> > 100% CPU usage. It can't be killed with 'kill -9'. Shutdown
> > works, though. Kernel is 2.6.20 FC6 config, and I'm 99.9%
> > sure the module signing has nothing to do with this.
> >
>
> No it probably has to do with printing a message during module removal.
I just reproduced this, and something really spooky happened.
After echo t > /proc/sysrq-trigger, the 'rmmod' process doesn't
show up in the backtrace. Everything else is there though.
The process shows up in a regular 'ps', but not in the sysrq output.
Most bizarre.
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2007-02-26 21:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-26 20:35 netconsole module cannot be removed Chuck Ebbert
2007-02-26 21:31 ` Stephen Hemminger
2007-02-26 21:40 ` Chuck Ebbert
2007-02-26 21:42 ` Dave Jones [this message]
2007-02-26 23:07 ` Chuck Ebbert
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