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Re: [xfs-masters] xfs deadlock in stable kernel 3.0.4

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [xfs-masters] xfs deadlock in stable kernel 3.0.4
From: Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>
Date: Wed, 21 Sep 2011 09:40:03 +0200
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
In-reply-to: <20110921021133.GM15688@dastard>
References: <4E705C42.6020909@xxxxxxxxxxxx> <20110914143005.GA28496@xxxxxxxxxxxxx> <4E75B660.1030502@xxxxxxxxxxxx> <20110918230245.GF15688@dastard> <4E78665E.8030409@xxxxxxxxxxxx> <20110920160226.GA25542@xxxxxxxxxxxxx> <4E78CBF4.1030505@xxxxxxxxxxxx> <20110920172455.GA30757@xxxxxxxxxxxxx> <4E78CEFD.9030603@xxxxxxxxxxxx> <20110920223047.GA13758@xxxxxxxxxxxxx> <20110921021133.GM15688@dastard>
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Am 21.09.2011 04:11, schrieb Dave Chinner:

How much memory does your test machine have? The performance will be
vastly different if there is enough RAM to hold the working set of
inodes and page cache (~20GB all up), and that could be one of the
factors contributing to the problems.
The livesystems which crash within hours have between 48GB and 64GB RAM. But my testing system has only 8GB.

The above xfs_info output is from your 160GB SSD - what's the output
from the 1TB device?

The 1TB device is now doing something else and does not have XFS on it anymore. But here are the layouts of two livesystems.

xfs_info /dev/sda6
meta-data=/dev/root isize=256 agcount=4, agsize=35767872 blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=143071488, imaxpct=25
         =                       sunit=64     swidth=512 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal               bsize=4096   blocks=69888, version=2
         =                       sectsz=512   sunit=64 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

xfs_info /dev/sda6
meta-data=/dev/root isize=256 agcount=4, agsize=35768000 blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=143071774, imaxpct=25
         =                       sunit=64     swidth=512 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal               bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=64 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0


Also, what phase do you see it hanging in? the random stat phase is
terribly slow on spinning disks, so if I can avoid that it woul dbe
nice....
Creating or deleting files. never in the stat phase.

Stefan

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