From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Brown <neilb@cse.unsw.edu.au>
Subject: Re: buffer head read/write
Date: Tue, 10 Dec 2002 11:36:26 +1100
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To: David Chow <davidchow@shaolinmicro.com>
In-Reply-To: message from David Chow on Tuesday December 10
List-Id: linux-fsdevel.vger.kernel.org

On Tuesday December 10, davidchow@shaolinmicro.com wrote:
> Hi all,
> 
> Is there a way to make sure I submit a buffer head read/write and make 
> sure it is commited immediately? (sychronized) . Please give direction 
> on examples in the kernel code? Thanks.

md does (or will) read/write it's super-blocks that way.
In 2.5, see drivers/md/md.c:sync_page_io
In 2.4, see
    http://cgi.cse.unsw.edu.au/~neilb/patches/linux-stable/2.4.leading/2002-12-09:01/005MDSyncIo

... I haven't submitted it yet.

NeilBrown