From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: ext4 lock ordering patch
Date: Mon, 26 May 2008 23:21:09 +0530
Message-ID: <20080526175109.GA14718@skywalker>
References: <20080526173452.GL32407@duck.suse.cz>
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Cc: cmm@us.ibm.com, linux-ext4@vger.kernel.org
To: Jan Kara <jack@suse.cz>
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Sender: linux-ext4-owner@vger.kernel.org

On Mon, May 26, 2008 at 07:34:52PM +0200, Jan Kara wrote:
>   Hi Mingming,
> 
>   I've noticed you removed the patch reversing locking order of page lock
> and transaction start from ext4 patch queue. Was this because of that
> reported performance problem or for some other reason? As far as I've
> understood that problem has been just in the patch fixing the delalloc mode
> part so just removing that patch would be enough AFAICT.
>   Anyway, the problem is I have now ordered mode rewrite for JBD2/ext4
> which depends on this patch so the question is how to proceed... Should we
> first fix that delalloc problem (are you looking into that?) or do we merge
> all the changes and then fixup the delalloc code?
> 
> 								Honza

That was due to delalloc interaction with locking order change patches.
I am right now testing some changes for delalloc. But I still have file
system hang with fsstress. So I haven't posted the latest changes yet.


-aneesh