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Re: xfs deadlock in stable kernel 3.0.4

To: Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>
Subject: Re: xfs deadlock in stable kernel 3.0.4
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 20 Sep 2011 13:24:55 -0400
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, aelder@xxxxxxx, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
In-reply-to: <4E78CBF4.1030505@xxxxxxxxxxxx>
References: <4E6EF274.7050007@xxxxxxxxxxxx> <20110913205018.GA8543@xxxxxxxxxxxxx> <4E70571A.80108@xxxxxxxxxxxx> <4E705C42.6020909@xxxxxxxxxxxx> <20110914143005.GA28496@xxxxxxxxxxxxx> <4E75B660.1030502@xxxxxxxxxxxx> <20110918230245.GF15688@dastard> <4E78665E.8030409@xxxxxxxxxxxx> <20110920160226.GA25542@xxxxxxxxxxxxx> <4E78CBF4.1030505@xxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
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)

> >Note that 2.6.38 moved the whole log grant code to a lockless algorithm,
> >so this might be a likely culprit if you're managing to hit race windows
> >no one else does, i.e. this really is a timing issue.
> I'm nearly willing todo anything to solve this. What can i do to
> help. My last hope from today was to get some code lines with kgdb -
> sadly it does not happen at all when kgdb is attached ;-(

I'll run tests on a system with a pci-e flash device today.  Just to
make sure we are on the same page, can you give me your kernel .config
in addition to the mkfs output above?

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