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Re: xfs: xfs_io oops on _raw_spin_lock

To: Kamal Dasu <kdasu.kdev@xxxxxxxxx>
Subject: Re: xfs: xfs_io oops on _raw_spin_lock
From: Ben Myers <bpm@xxxxxxx>
Date: Wed, 23 Jan 2013 16:12:26 -0600
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20130123013509.GR2498@dastard>
References: <CAC=U0a3XqDC7+14ox1bQ2iLLhuQYgsTMkq0YVos+u6_eaiRxnQ@xxxxxxxxxxxxxx> <20130123013509.GR2498@dastard>
User-agent: Mutt/1.5.20 (2009-06-14)
Hey Kamal,

On Wed, Jan 23, 2013 at 12:35:09PM +1100, Dave Chinner wrote:
> On Tue, Jan 22, 2013 at 08:24:02PM -0500, Kamal Dasu wrote:
> > I am running a simple test with xfs_io on Kernel 3.3 writing in
> > O_DIRECT mode and I get
> > 
> > # /rt.sh
> > ++ DEV=/dev/sda2
> > ++ RTDEV=/dev/sda3
> > ++ MNT=/mnt/xfsmnt
> > ++ mkdir /mnt/xfsmnt
> > ++ mkfs.xfs -f /dev/sda2 -r extsize=2m,rtdev=/dev/sda3
> > meta-data=/dev/sda2              isize=256    agcount=4, agsize=983479 blks
> >          =                       sectsz=512   attr=2, projid32bit=0
> > data     =                       bsize=4096   blocks=3933916, imaxpct=25
> >          =                       sunit=0      swidth=0 blks
> > naming   =version 2              bsize=4096   ascii-ci=0
> > log      =internal log           bsize=4096   blocks=2560, version=2
> >          =                       sectsz=512   sunit=0 blks, lazy-count=1
> > realtime =/dev/sda3              extsz=2097152 blocks=240089416,
> > rtextents=468924
> 
> Patches are pending in 3.8 to fix the oops, but it won't fix your
> problems.....

Here is the patch Dave is referring to.
http://oss.sgi.com/archives/xfs/2013-01/msg00323.html

It prevents xfs_perag_get returning a null pag.

Regards,
        Ben

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