linux-ext4 - [Bug 36262] ext3 umount: BUG: unable to handle kernel paging request

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Message-Id: <201106021023.p52ANCP7001604@demeter2.kernel.org>
Date:	Thu, 2 Jun 2011 10:23:12 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 36262] ext3 umount: BUG: unable to handle kernel paging request

https://bugzilla.kernel.org/show_bug.cgi?id=36262


Jan Kara <jack@...e.cz> changed:

           What    |Removed                     |Added
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                 CC|                            |axboe@...nel.dk




--- Comment #3 from Jan Kara <jack@...e.cz>  2011-06-02 10:23:12 ---
Hmm, by any chance, was the USB disk pulled before the umount actually run?

Jens, it seems we have destroyed the BDI before the filesystem was properly
unmounted (the oops is just NULL pointer dereference hidden by new percpu code)
because fbc->counters == NULL for the BDI_RECLAIMABLE stats counter.

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