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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, 14 Sep 2011 10:49:20 +0200
Cc: "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>, aelder@xxxxxxx
In-reply-to: <4E705C42.6020909@xxxxxxxxxxxx>
References: <1D2B34A7-7BB9-4E4E-9CA2-382C210E125F@xxxxxxxxxxxx> <20110912152133.GA8345@xxxxxxxxxxxxx> <C6515E45-5724-43DD-95A8-1F89AFE29601@xxxxxxxxxxxx> <20110912200543.GA22409@xxxxxxxxxxxxx> <4E6EF274.7050007@xxxxxxxxxxxx> <20110913205018.GA8543@xxxxxxxxxxxxx> <4E70571A.80108@xxxxxxxxxxxx> <4E705C42.6020909@xxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.18) Gecko/20110617 Thunderbird/3.1.11
Hi,

Am 14.09.2011 09:48, schrieb Stefan Priebe - Profihost AG:
Hi,

Oops, that's a bug that I actually introduced myself. Fix below:

Thanks for the patch.

Now we have the following situation:

1.) Systems running fine with 2.6.32, 2.6.38 and with 3.1 rc-6 + patch
2.) Sadly it does not run with 3.0.4 for more than 1 hour. And 3.0.X
will become the next long term stable. So there will be a lot of people
using it.
3.) I have seen this deadlock on systems with aacraid and with intel
ahci onboard. (that's all we're using)
4.) I still write to other devices / raids on the same controller while
the XFS root filesystem hangs.

Sadly it was now crashing with 3.1 rc-6 + patch again. Sorry i was to
fast to write you an email.

So might it be that the problem at least in 3.1 lies in:
[] ? mark_held_locks+0xc9/0xef
[] ? _raw_spin_unlock_irqrestore+0x3f/0x47

and not in XFS?

Stefan

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