From: Tejun Heo <teheo@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>,
jaxboe@fusionio.com, James.Bottomley@suse.de,
linux-fsdevel@vger.kernel.org, linux-scsi@vger.kernel.org,
tytso@mit.edu, chris.mason@oracle.com, swhiteho@redhat.com,
konishi.ryusuke@lab.ntt.co.jp, dm-devel@redhat.com,
linux-raid@vger.kernel.org
Subject: Re: [PATCH REPOST RFC] relaxed barriers
Date: Mon, 09 Aug 2010 16:50:37 +0200 [thread overview]
Message-ID: <4C6015BD.6090304@suse.de> (raw)
In-Reply-To: <20100808143126.GA15531@lst.de>
On 08/08/2010 04:31 PM, Christoph Hellwig wrote:
> On Sat, Aug 07, 2010 at 12:13:06PM +0200, Tejun Heo wrote:
>> The patch was on top of v2.6.35 but was generated against dirty tree
>> and wouldn't apply cleanly. Here's the proper one.
>
> Here's an updated version:
>
> (a) ported to Jens' current block tree
> (b) optimize barriers on devices not requiring flushes to be no-ops
> (b) redo the blk_queue_ordered interface to just set QUEUE_HAS_FLUSH
> and QUEUE_HAS_FUA flags.
Nice. I'm working on a properly split patchset implementing
REQ_FLUSH/FUA based interface, which replaces REQ_HARDBARRIER. Empty
request w/ REQ_FLUSH just flushes cache but has no other ordering
restrictions. REQ_FLUSH + data means preflush + data write. REQ_FUA
+ data means data would be committed to NV media on completion.
REQ_FLUSH + FUA + data means preflush + NV data write. All FLUSH/FUA
requests w/ data are ordered only against each other. I think I'll be
able to post in several days.
Thanks.
--
tejun
prev parent reply other threads:[~2010-08-09 14:50 UTC|newest]
Thread overview: 155+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-27 16:56 [RFC] relaxed barrier semantics Christoph Hellwig
2010-07-27 17:54 ` Jan Kara
2010-07-27 18:35 ` Vivek Goyal
2010-07-27 18:42 ` James Bottomley
2010-07-27 18:51 ` Ric Wheeler
2010-07-27 19:43 ` Christoph Hellwig
2010-07-27 19:38 ` Christoph Hellwig
2010-07-28 8:08 ` Tejun Heo
2010-07-28 8:20 ` Tejun Heo
2010-07-28 13:55 ` Vladislav Bolkhovitin
2010-07-28 14:23 ` Tejun Heo
2010-07-28 14:37 ` James Bottomley
2010-07-28 14:44 ` Tejun Heo
2010-07-28 16:17 ` Vladislav Bolkhovitin
2010-07-28 16:17 ` Vladislav Bolkhovitin
2010-07-28 16:16 ` Vladislav Bolkhovitin
2010-07-28 8:24 ` Christoph Hellwig
2010-07-28 8:40 ` Tejun Heo
2010-07-28 8:50 ` Christoph Hellwig
2010-07-28 8:58 ` Tejun Heo
2010-07-28 9:00 ` Christoph Hellwig
2010-07-28 9:11 ` Hannes Reinecke
2010-07-28 9:16 ` Christoph Hellwig
2010-07-28 9:24 ` Tejun Heo
2010-07-28 9:38 ` Christoph Hellwig
2010-07-28 9:28 ` Steven Whitehouse
2010-07-28 9:35 ` READ_META semantics, was " Christoph Hellwig
2010-07-28 13:52 ` Jeff Moyer
2010-07-28 9:17 ` Tejun Heo
2010-07-28 9:28 ` Christoph Hellwig
2010-07-28 9:48 ` Tejun Heo
2010-07-28 10:19 ` Steven Whitehouse
2010-07-28 11:45 ` Christoph Hellwig
2010-07-28 12:47 ` Jan Kara
2010-07-28 23:00 ` Christoph Hellwig
2010-07-29 10:45 ` Jan Kara
2010-07-29 16:54 ` Joel Becker
2010-07-29 17:02 ` Christoph Hellwig
2010-07-29 17:02 ` Christoph Hellwig
2010-07-29 1:44 ` Ted Ts'o
2010-07-29 2:43 ` Vivek Goyal
2010-07-29 2:43 ` Vivek Goyal
2010-07-29 8:42 ` Christoph Hellwig
2010-07-29 20:02 ` Vivek Goyal
2010-07-29 20:06 ` Christoph Hellwig
2010-07-30 3:17 ` Vivek Goyal
2010-07-30 7:07 ` Christoph Hellwig
2010-07-30 7:41 ` Vivek Goyal
2010-08-02 18:28 ` [RFC PATCH] Flush only barriers (Was: Re: [RFC] relaxed barrier semantics) Vivek Goyal
2010-08-03 13:03 ` Christoph Hellwig
2010-08-04 15:29 ` Vivek Goyal
2010-08-04 16:21 ` Christoph Hellwig
2010-07-29 8:31 ` [RFC] relaxed barrier semantics Christoph Hellwig
2010-07-29 11:16 ` Jan Kara
2010-07-29 13:00 ` extfs reliability Vladislav Bolkhovitin
2010-07-29 13:08 ` Christoph Hellwig
2010-07-29 14:12 ` Vladislav Bolkhovitin
2010-07-29 14:34 ` Jan Kara
2010-07-29 18:20 ` Vladislav Bolkhovitin
2010-07-29 18:49 ` Vladislav Bolkhovitin
2010-07-29 14:26 ` Jan Kara
2010-07-29 18:20 ` Vladislav Bolkhovitin
2010-07-29 18:58 ` Ted Ts'o
2010-07-29 19:44 ` [RFC] relaxed barrier semantics Ric Wheeler
2010-07-29 19:44 ` Ric Wheeler
2010-07-29 19:49 ` Christoph Hellwig
2010-07-29 19:56 ` Ric Wheeler
2010-07-29 19:59 ` James Bottomley
2010-07-29 20:03 ` Christoph Hellwig
2010-07-29 20:07 ` James Bottomley
2010-07-29 20:11 ` Christoph Hellwig
2010-07-30 12:45 ` Vladislav Bolkhovitin
2010-07-30 12:56 ` Christoph Hellwig
2010-08-04 1:58 ` Jamie Lokier
2010-07-30 12:46 ` Vladislav Bolkhovitin
2010-07-30 12:57 ` Christoph Hellwig
2010-07-30 13:09 ` Vladislav Bolkhovitin
2010-07-30 13:12 ` Christoph Hellwig
2010-07-30 17:40 ` Vladislav Bolkhovitin
2010-07-29 20:58 ` Ric Wheeler
2010-07-29 22:30 ` Andreas Dilger
2010-07-29 23:04 ` Ted Ts'o
2010-07-29 23:08 ` Ric Wheeler
2010-07-29 23:08 ` Ric Wheeler
2010-07-29 23:28 ` James Bottomley
2010-07-29 23:37 ` James Bottomley
2010-07-30 0:19 ` Ted Ts'o
2010-07-30 12:56 ` Vladislav Bolkhovitin
2010-07-30 7:11 ` Christoph Hellwig
2010-07-30 7:11 ` Christoph Hellwig
2010-07-30 12:56 ` Vladislav Bolkhovitin
2010-07-30 12:56 ` Vladislav Bolkhovitin
2010-07-30 13:07 ` Tejun Heo
2010-07-30 13:22 ` Vladislav Bolkhovitin
2010-07-30 13:27 ` Vladislav Bolkhovitin
2010-07-30 13:09 ` Christoph Hellwig
2010-07-30 13:25 ` Vladislav Bolkhovitin
2010-07-30 13:34 ` Christoph Hellwig
2010-07-30 13:44 ` Vladislav Bolkhovitin
2010-07-30 14:20 ` Christoph Hellwig
2010-07-31 0:47 ` Jan Kara
2010-07-31 9:12 ` Christoph Hellwig
2010-08-02 13:14 ` Jan Kara
2010-08-02 10:38 ` Vladislav Bolkhovitin
2010-08-02 12:48 ` Christoph Hellwig
2010-08-02 19:03 ` xfs rm performance Vladislav Bolkhovitin
2010-08-02 19:18 ` Christoph Hellwig
2010-08-05 19:31 ` Vladislav Bolkhovitin
2010-08-02 19:01 ` [RFC] relaxed barrier semantics Vladislav Bolkhovitin
2010-08-02 19:26 ` Christoph Hellwig
2010-07-31 0:35 ` Jan Kara
2010-08-02 16:47 ` Ryusuke Konishi
2010-08-02 17:39 ` Chris Mason
2010-08-05 13:11 ` Vladislav Bolkhovitin
2010-08-05 13:32 ` Chris Mason
2010-08-05 14:52 ` Hannes Reinecke
2010-08-05 15:17 ` Chris Mason
2010-08-05 17:07 ` Christoph Hellwig
2010-08-05 14:52 ` Hannes Reinecke
2010-08-05 19:48 ` Vladislav Bolkhovitin
2010-08-05 19:48 ` Vladislav Bolkhovitin
2010-08-05 19:50 ` Christoph Hellwig
2010-08-05 20:05 ` Vladislav Bolkhovitin
2010-08-06 14:56 ` Hannes Reinecke
2010-08-06 18:38 ` Vladislav Bolkhovitin
2010-08-06 23:38 ` Christoph Hellwig
2010-08-06 23:34 ` Christoph Hellwig
2010-08-05 17:09 ` Christoph Hellwig
2010-08-05 19:32 ` Vladislav Bolkhovitin
2010-08-05 19:40 ` Christoph Hellwig
2010-08-05 13:11 ` Vladislav Bolkhovitin
2010-07-28 13:56 ` Vladislav Bolkhovitin
2010-07-28 14:42 ` Vivek Goyal
2010-07-27 19:37 ` Christoph Hellwig
2010-08-03 18:49 ` [PATCH, RFC 1/2] relaxed cache flushes Christoph Hellwig
2010-08-03 18:51 ` [PATCH, RFC 2/2] dm: support REQ_FLUSH directly Christoph Hellwig
2010-08-04 4:57 ` Kiyoshi Ueda
2010-08-04 8:54 ` Christoph Hellwig
2010-08-05 2:16 ` Jun'ichi Nomura
2010-08-26 22:50 ` Mike Snitzer
2010-08-27 0:40 ` Mike Snitzer
2010-08-27 1:20 ` Jamie Lokier
2010-08-27 1:43 ` Jun'ichi Nomura
2010-08-27 4:08 ` Mike Snitzer
2010-08-27 5:52 ` Jun'ichi Nomura
2010-08-27 14:13 ` Mike Snitzer
2010-08-30 4:45 ` Jun'ichi Nomura
2010-08-30 8:33 ` Tejun Heo
2010-08-30 12:43 ` Mike Snitzer
2010-08-30 12:45 ` Tejun Heo
2010-08-06 16:04 ` [PATCH, RFC] relaxed barriers Tejun Heo
2010-08-06 23:34 ` Christoph Hellwig
2010-08-07 10:13 ` [PATCH REPOST " Tejun Heo
2010-08-08 14:31 ` Christoph Hellwig
2010-08-09 14:50 ` Tejun Heo [this message]
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