linux-ext4 - Re: freeze

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Message-ID: <20121008161926.GH9243@quack.suse.cz>
Date:	Mon, 8 Oct 2012 18:19:26 +0200
From:	Jan Kara <jack@...e.cz>
To:	Prashant Shah <pshah.mumbai@...il.com>
Cc:	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: freeze_bdev hangs

On Mon 08-10-12 13:13:34, Prashant Shah wrote:
> Hi,
> 
> On Fri, Oct 5, 2012 at 11:03 PM, Eric Sandeen <sandeen@...hat.com> wrote:
> > I haven't looked at your custom code, but freeze has changed a bit lately,
> > and "hangs" is a very vague description
> >
> > -Eric
> 
> I am monitoring the file system (ext3) for block writes and on
> linux-2.6.18 (centos - 5.8 64bit) there are lots of writes request per
> second with inode number set to 0 even when the file system is idle
> and without any work loads. Didnt see this happen on linux-3.x.
> 
> filter: sector=242983 inode=0
> filter: sector=242991 inode=0
> filter: sector=242999 inode=0
> filter: sector=243007 inode=0
> filter: sector=243015 inode=0
> filter: sector=243023 inode=0
> filter: sector=243031 inode=0
> filter: sector=243039 inode=0
  And what tool are you using for monitoring?

								Honza

-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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