linux-ext4 - Re: [PATCH] block_write_full_page: switch synchronous writes to use WRITE_SYNC

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Message-ID: <20090408152637.GB14895@mit.edu>
Date:	Wed, 8 Apr 2009 11:26:37 -0400
From:	Theodore Tso <tytso@....edu>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	jack@...e.cz
Subject: Re: [PATCH] block_write_full_page: switch synchronous writes to
	use  WRITE_SYNC_PLUG

On Wed, Apr 08, 2009 at 08:00:33AM +0200, Jens Axboe wrote:
> 
> I think you should comment on why we don't need to do the actual unplug.
> See what I added in fs/jbd/commit.c:journal_commit_transaction():
> 
>         /*
>          * Use plugged writes here, since we want to submit several
>          * before we unplug the device. We don't do explicit
>          * unplugging in here, instead we rely on sync_buffer() doing
>          * the unplug for us.
>          */

OK, agreed.  I'll add a comment explaining what is going on in the
patch; better there than in the commit log.

					- Ted
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