linux-kernel - complete IO hang since a few kernel revision

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Date:	Mon, 5 Oct 2009 03:16:27 +0200
From:	Norbert Preining <preining@...ic.at>
To:	linux-kernel@...r.kernel.org
Subject: complete IO hang since a few kernel revision

Hi everyone,

(please Cc)

kernel 2.6.31.1, 2.6.31.2rc1, 2.6.31, 2.6.30 (at least)
Intel Corporation ICH9M/M-E SATA AHCI


I am experiencing IO stalls of real serious dimensions. I mean up to 20secs
waiting for some operations.

That normally happeny when I do a svn up on a big subversion repository,
but even on other locations.

Yesterday a simple sync took 30sec although I was not doing anything else.

I am *quite* sure that it wasn't like that in former kernel revisions, but
I don't have old ones at hand for testing.

Is there something known about a regression in this area?

Sorry for not Cc-ing the right people, didn't know who it could be.

Thanks a lot for any help/remarks/suggestions

Norbert

-------------------------------------------------------------------------------
Dr. Norbert Preining                                        Associate Professor
JAIST Japan Advanced Institute of Science and Technology   preining@...st.ac.jp
Vienna University of Technology                               preining@...ic.at
Debian Developer (Debian TeX Task Force)                    preining@...ian.org
gpg DSA: 0x09C5B094      fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
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