From: Prashant Shah <pshah.mumbai@gmail.com>
Subject: Re: freeze_bdev hangs
Date: Tue, 4 Dec 2012 18:40:33 +0530
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Cc: Eric Sandeen <sandeen@redhat.com>, linux-ext4@vger.kernel.org
To: Jan Kara <jack@suse.cz>
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Hi,

On Wed, Oct 10, 2012 at 3:19 AM, Jan Kara <jack@suse.cz> wrote:
>>   OK. There are several ways how I could imagine you hit ino == 0. Either
>> someone is using direct IO or inode is a block device inode...
>>

Most of the inode 0 writes belonged to journal (verified with the
sector number). I think that such journal writes should set the inode
to 8 or whatever is reserved for the journal rather than 0.

Regards.