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Re: tasks hangs in D state while writing to xfs

To: Marcin Miros?aw <marcin@xxxxxxxx>
Subject: Re: tasks hangs in D state while writing to xfs
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sun, 16 Oct 2011 08:35:47 -0400
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <4E9AC49D.60303@xxxxxxxx>
References: <j7bs98$5bs$1@xxxxxxxxxxxxxxx> <20111015220922.GR3159@dastard> <4E9AC49D.60303@xxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Sun, Oct 16, 2011 at 01:48:45PM +0200, Marcin Miros?aw wrote:
> Thanks for link. I've tried kernel linux-3.1-rc9, xfs behaves better but
> still is something not right. I'm rsyncincg many files, after sometime
> rsync hangs, it looks like do nothing for about 30-90 seconds and
> continues copying. I did run "sync" when rsync was hanging and sync also
> hangs. It looks like xfs has hiccup.

3.1-rc9 does not include these fixes yet, you'll either need to get
Linus' latests git tree or apply these patches manually.

I'd also love to see the output of dmesg after doing a

        'echo t > /proc/sysrq-trigger'

from these hangs if you can still reproduce them.

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