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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 <s.priebe@xxxxxxxxxxxx>
Date: Wed, 21 Sep 2011 15:39:16 +0200
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, "aelder@xxxxxxx" <aelder@xxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
In-reply-to: <20110921113935.GA8947@xxxxxxxxxxxxx>
References: <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> <4E79940A.4000502@xxxxxxxxxxxx> <20110921113935.GA8947@xxxxxxxxxxxxx>
> One thing I noticed is that your config seems to run many fs tasks
> a lot slower than mine, but I'm not entirely sure why.
Strange would you post your config too?

> The only interesting things I noticed in your config where that you
> use slub instead of slab, which does a lot of high order allocations
> and has caused lots of trouble in the past, and that you enable
> CONFIG_CC_OPTIMIZE_FOR_SIZE, which has caused mis-compilation
> of complicated code in the past.  I don't want to blame it directly,
> but I could see how that causes problems with some of the atomic64_t
> games XFS plays since 2.6.38.
Will remove it.

At least dave was able to reproduce so he can probably help too.



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