linux-kernel - Re: 2.6.39-rc3, 2.6.39-rc4: XFS lockup

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Message-ID: <20110520112018.GB3867@belkar.wrar.name>
Date:	Fri, 20 May 2011 17:20:18 +0600
From:	Andrey Rahmatullin <wrar@...linux.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Bruno Prémont <bonbons@...ux-vserver.org>,
	xfs-masters@....sgi.com, xfs@....sgi.com,
	Christoph Hellwig <hch@...radead.org>,
	Alex Elder <aelder@....com>,
	Dave Chinner <dchinner@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.39-rc3, 2.6.39-rc4: XFS lockup - regression since 2.6.38

On Fri, Apr 29, 2011 at 11:19:29AM +1000, Dave Chinner wrote:
> > x4 ~ # xfs_info /
> > meta-data=/dev/root              isize=256    agcount=4, agsize=1949824 blks
> >          =                       sectsz=512   attr=2
> > data     =                       bsize=4096   blocks=7799296, imaxpct=25
> >          =                       sunit=128    swidth=128 blks
> > naming   =version 2              bsize=4096   ascii-ci=0
> > log      =internal               bsize=4096   blocks=3808, version=2
> >          =                       sectsz=512   sunit=8 blks, lazy-count=1
> > realtime =none                   extsz=4096   blocks=0, rtextents=0
> OK, so the common elements here appears to be root filesystems
> with small log sizes, which means they are tail pushing all the
> time metadata operations are in progress. 
Does that mean that such filesystems are not optimal in terms of
performance and/or reliability and should have larger log sizes?

-- 
WBR, wRAR

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