linux-ext4 - Re: [Bug 25832] kernel crashes when a mounted ext3/4 file system is physically removed

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Message-ID: <20110910140628.GA17511@thunk.org>
Date:	Sat, 10 Sep 2011 10:06:28 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Rocko Requin <rockorequin@...mail.com>
Cc:	stern@...land.harvard.edu, bugzilla-daemon@...zilla.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [Bug 25832] kernel crashes when a mounted ext3/4 file system
 is physically removed

On Sat, Sep 10, 2011 at 01:49:44AM +0000, Rocko Requin wrote:
> 
> The patch does stop my console-only test script from crashing the
> kernel (thanks for figuring this patch out, Ted!), but if I try it
> from a desktop, the desktop still freezes after two or three
> bind/unbind iterations. So I guess there must be another way to try
> and access the missing file system that also need patching.

Can you get stack traces or register information?  Via sysrq-t /
sysrq-p?  This might require setting up serial console on your desktop
if you don't have kernel mode switching set up so you can switch away
from the X server.

							- Ted
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