linux-kernel - Re: [PATCH 26/30] ext4: do not send discards as barriers

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Message-ID: <20100825160032.GC3229@lst.de>
Date:	Wed, 25 Aug 2010 18:00:32 +0200
From:	Christoph Hellwig <hch@....de>
To:	Tejun Heo <tj@...nel.org>
Cc:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-raid@...r.kernel.org, hch@....de,
	James.Bottomley@...e.de, tytso@....edu, chris.mason@...cle.com,
	swhiteho@...hat.com, konishi.ryusuke@....ntt.co.jp,
	dm-devel@...hat.com, vst@...b.net, jack@...e.cz,
	rwheeler@...hat.com, hare@...e.de, neilb@...e.de,
	rusty@...tcorp.com.au, mst@...hat.com, jeremy@...p.org,
	snitzer@...hat.com, k-ueda@...jp.nec.com,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 26/30] ext4: do not send discards as barriers

On Wed, Aug 25, 2010 at 05:58:42PM +0200, Christoph Hellwig wrote:
> On Wed, Aug 25, 2010 at 05:47:43PM +0200, Tejun Heo wrote:
> > From: Christoph Hellwig <hch@...radead.org>
> > 
> > ext4 already uses synchronous discards, no need to add I/O barriers.
> 
> This needs the patch that Jan sent in reply to my initial version merged
> into it.

Actually the jbd2 patch needs it merged, but the point still stands.
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