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Re: xfs deadlock in stable kernel 3.0.4

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: xfs deadlock in stable kernel 3.0.4
From: Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>
Date: Wed, 21 Sep 2011 09:36:42 +0200
Cc: "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>, aelder@xxxxxxx
In-reply-to: <20110920223047.GA13758@xxxxxxxxxxxxx>
References: <4E70571A.80108@xxxxxxxxxxxx> <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>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.21) Gecko/20110831 Thunderbird/3.1.13
Am 21.09.2011 00:30, schrieb Christoph Hellwig:
On Tue, Sep 20, 2011 at 07:35:57PM +0200, Stefan Priebe - Profihost AG wrote:
Am 20.09.2011 19:24, schrieb Christoph Hellwig:
On Tue, Sep 20, 2011 at 07:23:00PM +0200, Stefan Priebe - Profihost AG wrote:
  - what is the fs geometry?
What do you exactly mean? I've seen this on 1TB and 160GB SSD
devices with totally different disk layout.

The output of mkfs.xfs (of xfs_info after it's been created)

ssd:~# xfs_info /dev/sda3
meta-data=/dev/root              isize=256    agcount=4, agsize=9517888 blks
          =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=38071552, imaxpct=25
          =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal               bsize=4096   blocks=18589, version=2
          =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

Nothing special there.

So far I haven't been able to recreate it.  How many runs did you
normally need on 3.1-rc?  Note that so far I've run my known working
kernel, I'll test your config plus the drivers I need next.

I had only used 3.0.4 with bonnie++ to reproduce. 3.1-rc was running on a prod. system.

Sadly i'm also not able to reproduce it reliable on every partition. Sometimes it works sometimes not. Just retrying does not help. I had to copy and delete random files from the part. and then start bonnie++ on it. Perhaps i can give you a dd dump of the partition. But i had to recreate one. My Intel SSD is now massivly slower than when i started the tests. No idea why.

Stefan


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