From: Jens Axboe <axboe@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, mason@suse.com
Subject: Re: [PATCH] barrier patch set
Date: Mon, 22 Mar 2004 12:10:39 +0100 [thread overview]
Message-ID: <20040322111039.GL1481@suse.de> (raw)
In-Reply-To: <20040322030939.6243c1c2.akpm@osdl.org>
On Mon, Mar 22 2004, Andrew Morton wrote:
> Jens Axboe <axboe@suse.de> wrote:
> >
> > A first release of a collected barrier patchset for 2.6.5-rc1-mm2.
>
> The tagging of BIOs with set_buffer_ordered() or WRITE_BARRIER is a little
> awkward.
>
> Take the case of an ext2 fsync() or even an ext3 fsync() which frequently
> will not trigger a commit. If we must perform the barrier by tagging the
> final BIO, that will be tricky to implement. I could set some new field in
> struct writeback_control and rework the mpage code, but working out "this
> is the final BIO for this operation" is a fairly hard thing to do.
> sys_sync() would require even more VFS surgery.
Yeah, it's not very pretty if you have to track the last sumit. Chris
complained about that in 2.4 as well :-)
> Generally, it would be much preferable to use the blkdev_issue_flush()
> API. What is the status of that?
It'll be fully supported.
--
Jens Axboe
prev parent reply other threads:[~2004-03-22 11:10 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-19 15:35 [PATCH] barrier patch set Jens Axboe
2004-03-19 16:30 ` Mika Penttilä
2004-03-19 18:16 ` Jens Axboe
2004-03-19 18:44 ` Mika Penttilä
2004-03-20 9:55 ` Jens Axboe
2004-03-19 16:34 ` Jeff Garzik
2004-03-19 18:19 ` Jens Axboe
2004-03-19 23:01 ` Matthias Andree
2004-03-20 0:02 ` Bartlomiej Zolnierkiewicz
2004-03-20 1:48 ` Johannes Stezenbach
2004-03-20 2:13 ` Bartlomiej Zolnierkiewicz
2004-03-20 2:53 ` Johannes Stezenbach
2004-03-20 16:03 ` Bartlomiej Zolnierkiewicz
2004-03-20 11:36 ` Matthias Andree
2004-03-20 16:00 ` Bartlomiej Zolnierkiewicz
2004-03-20 23:36 ` Johannes Stezenbach
2004-03-21 1:33 ` Bartlomiej Zolnierkiewicz
2004-03-20 18:52 ` Helge Hafting
2004-03-22 11:15 ` Matthias Andree
2004-03-19 23:59 ` Bartlomiej Zolnierkiewicz
2004-03-20 0:14 ` Jeff Garzik
2004-03-20 0:40 ` Bartlomiej Zolnierkiewicz
2004-03-20 0:42 ` Jeff Garzik
2004-03-20 1:24 ` Bartlomiej Zolnierkiewicz
2004-03-20 9:58 ` Jens Axboe
2004-03-20 10:12 ` Jeff Garzik
2004-03-20 10:19 ` Jens Axboe
2004-03-20 10:37 ` Jeff Garzik
2004-03-20 16:30 ` Bartlomiej Zolnierkiewicz
2004-03-21 18:12 ` Jeff Garzik
2004-03-20 10:21 ` Jeff Garzik
2004-03-20 15:54 ` Bartlomiej Zolnierkiewicz
2004-03-20 0:17 ` Jeff Garzik
2004-03-20 9:53 ` Jens Axboe
2004-03-20 16:23 ` Bartlomiej Zolnierkiewicz
2004-03-20 16:27 ` Jens Axboe
2004-03-20 16:32 ` Chris Mason
2004-03-20 17:05 ` Bartlomiej Zolnierkiewicz
2004-03-20 17:10 ` Chris Mason
2004-03-20 20:16 ` Bartlomiej Zolnierkiewicz
2004-03-21 9:43 ` Jens Axboe
2004-03-30 16:04 ` Stephen C. Tweedie
2004-03-30 19:19 ` Chris Mason
2004-03-30 21:50 ` Stephen C. Tweedie
2004-03-30 22:13 ` Chris Mason
2004-03-31 14:03 ` Stephen C. Tweedie
2004-03-31 14:27 ` Chris Mason
2004-03-31 18:28 ` Ric Wheeler
2004-03-30 22:21 ` Jeff Garzik
2004-03-30 22:36 ` Chris Wedgwood
2004-03-30 22:39 ` Jeff Garzik
2004-03-30 22:41 ` Chris Wedgwood
2004-03-30 22:40 ` Bartlomiej Zolnierkiewicz
2004-03-30 22:38 ` Jeff Garzik
2004-03-31 14:08 ` Stephen C. Tweedie
2004-03-31 14:21 ` Chris Mason
2004-03-31 21:26 ` Jeff Garzik
2004-03-31 22:09 ` Chris Mason
2004-03-31 21:27 ` Jeff Garzik
2004-03-19 16:48 ` Marc-Christian Petersen
2004-03-19 18:19 ` Jens Axboe
2004-03-22 11:09 ` Andrew Morton
2004-03-22 11:10 ` Jens Axboe [this message]
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