linux-ext4 - [Bug 14830] When other IO is running sync times go to 10 to 20 minutes

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Message-Id: <201004020541.o325fZKw007754@demeter.kernel.org>
Date:	Fri, 2 Apr 2010 05:41:35 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 14830] When other IO is running sync times go to 10 to 20
 minutes

https://bugzilla.kernel.org/show_bug.cgi?id=14830





--- Comment #22 from Michael Godfrey <godfrey@....stanford.edu>  2010-04-02 05:41:26 ---
I tried another test with 2.6.32.10-90.fc12.x86_64.  I did
not expect an improvement.  But, the results were actually
a lot worse.  After starting an rsync  which transferred a
few 100GB through NFS, I started a sync using time sync.
This caused a number of the usual 2 minute timeout messages.  But, also
it did not close until about 20 minutes after the rsync had
completed.  All together  it ran for several hours. By the
way it was not possible to kill the sync using kill -9.

This is clearly hopeless.

Will anything be done about this in 2.6.33 for fc13?

Will the fact that Google is going with ext4 possibly help?

Michael

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