From: Christoph Hellwig <hch@infradead.org>
To: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: Christoph Hellwig <hch@infradead.org>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Jens Axboe <axboe@kernel.dk>,
Bart Van Assche <bvanassche@fusionio.com>,
Robert Elliott <Elliott@hp.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
viro@ZenIV.linux.org.uk, Or Gerlitz <ogerlitz@mellanox.com>,
Oren Duer <oren@mellanox.com>,
"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
Mike Christie <michaelc@cs.wisc.edu>,
linux-fsdevel@vger.kernel.org, Max Gurtovoy <maxg@mellanox.com>
Subject: Re: Performance degradation in IO writes vs. reads (was scsi-mq V2)
Date: Thu, 21 Aug 2014 06:03:15 -0700 [thread overview]
Message-ID: <20140821130315.GB1567@infradead.org> (raw)
In-Reply-To: <53F5E6C9.1020207@dev.mellanox.co.il>
On Thu, Aug 21, 2014 at 03:32:09PM +0300, Sagi Grimberg wrote:
> So I just got back to checking this issue of *extremely low* IO write
> performance I got in 3.16-rc2.
Please test with 3.16 final. There once issue each in aio and dio
that caused bad I/O performance regression that were only fixed last
minute in the 3.16 cycle.
next prev parent reply other threads:[~2014-08-21 13:03 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-25 16:51 scsi-mq V2 Christoph Hellwig
2014-06-25 16:51 ` [PATCH 01/14] sd: don't use rq->cmd_len before setting it up Christoph Hellwig
2014-07-09 11:12 ` Hannes Reinecke
2014-07-09 15:03 ` Christoph Hellwig
2014-06-25 16:51 ` [PATCH 02/14] scsi: split __scsi_queue_insert Christoph Hellwig
2014-07-09 11:12 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 03/14] scsi: centralize command re-queueing in scsi_dispatch_fn Christoph Hellwig
2014-07-08 20:51 ` Elliott, Robert (Server Storage)
2014-07-09 6:40 ` Christoph Hellwig
2014-07-09 11:13 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 04/14] scsi: set ->scsi_done before calling scsi_dispatch_cmd Christoph Hellwig
2014-07-09 11:14 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 05/14] scsi: push host_lock down into scsi_{host,target}_queue_ready Christoph Hellwig
2014-07-09 11:14 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 06/14] scsi: convert target_busy to an atomic_t Christoph Hellwig
2014-07-09 11:15 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 07/14] scsi: convert host_busy to atomic_t Christoph Hellwig
2014-07-09 11:15 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 08/14] scsi: convert device_busy " Christoph Hellwig
2014-07-09 11:16 ` Hannes Reinecke
2014-07-09 16:49 ` James Bottomley
2014-07-10 6:01 ` Christoph Hellwig
2014-06-25 16:51 ` [PATCH 09/14] scsi: fix the {host,target,device}_blocked counter mess Christoph Hellwig
2014-07-09 11:12 ` Hannes Reinecke
2014-07-10 6:06 ` Christoph Hellwig
2014-06-25 16:51 ` [PATCH 10/14] scsi: only maintain target_blocked if the driver has a target queue limit Christoph Hellwig
2014-07-09 11:19 ` Hannes Reinecke
2014-07-09 15:05 ` Christoph Hellwig
2014-06-25 16:51 ` [PATCH 11/14] scsi: unwind blk_end_request_all and blk_end_request_err calls Christoph Hellwig
2014-07-09 11:20 ` Hannes Reinecke
2014-06-25 16:51 ` [PATCH 12/14] scatterlist: allow chaining to preallocated chunks Christoph Hellwig
2014-07-09 11:21 ` Hannes Reinecke
2014-06-25 16:52 ` [PATCH 13/14] scsi: add support for a blk-mq based I/O path Christoph Hellwig
2014-07-09 11:25 ` Hannes Reinecke
2014-07-16 11:13 ` Mike Christie
2014-07-16 11:16 ` Christoph Hellwig
2014-06-25 16:52 ` [PATCH 14/14] fnic: reject device resets without assigned tags for the blk-mq case Christoph Hellwig
2014-07-09 11:27 ` Hannes Reinecke
2014-06-26 4:50 ` scsi-mq V2 Jens Axboe
2014-06-26 22:07 ` Elliott, Robert (Server Storage)
2014-06-27 14:42 ` Bart Van Assche
2014-06-30 15:20 ` Jens Axboe
2014-06-30 15:25 ` Christoph Hellwig
2014-06-30 15:54 ` Martin K. Petersen
2014-07-08 14:48 ` Christoph Hellwig
2014-07-09 16:39 ` Douglas Gilbert
2014-07-09 19:38 ` Jens Axboe
2014-07-10 0:53 ` Elliott, Robert (Server Storage)
2014-07-10 6:20 ` Christoph Hellwig
2014-07-10 13:36 ` Benjamin LaHaise
2014-07-10 13:39 ` Jens Axboe
2014-07-10 13:44 ` Benjamin LaHaise
2014-07-10 13:48 ` Jens Axboe
2014-07-10 13:50 ` Benjamin LaHaise
2014-07-10 13:52 ` Jens Axboe
2014-07-10 13:50 ` Christoph Hellwig
2014-07-10 13:52 ` Jens Axboe
2014-07-10 14:36 ` Elliott, Robert (Server Storage)
2014-07-10 14:45 ` Benjamin LaHaise
2014-07-10 15:11 ` Jeff Moyer
2014-07-10 19:59 ` Jens Axboe
2014-07-10 20:05 ` Jeff Moyer
2014-07-10 20:06 ` Jens Axboe
2014-07-10 15:51 ` Elliott, Robert (Server Storage)
2014-07-10 16:04 ` Christoph Hellwig
2014-07-10 16:14 ` Christoph Hellwig
2014-07-10 18:49 ` Elliott, Robert (Server Storage)
2014-07-10 19:14 ` Jeff Moyer
2014-07-10 19:36 ` Jeff Moyer
2014-07-10 21:10 ` Elliott, Robert (Server Storage)
2014-07-11 6:02 ` Elliott, Robert (Server Storage)
2014-07-11 6:14 ` Christoph Hellwig
2014-07-11 14:33 ` Elliott, Robert (Server Storage)
2014-07-11 14:55 ` Benjamin LaHaise
2014-07-12 21:50 ` Elliott, Robert (Server Storage)
2014-07-12 23:20 ` Elliott, Robert (Server Storage)
2014-07-13 17:15 ` Elliott, Robert (Server Storage)
2014-07-14 17:15 ` Benjamin LaHaise
2014-07-14 9:13 ` Sagi Grimberg
2014-08-21 12:32 ` Performance degradation in IO writes vs. reads (was scsi-mq V2) Sagi Grimberg
2014-08-21 13:03 ` Christoph Hellwig [this message]
2014-08-21 14:02 ` Sagi Grimberg
2014-08-24 16:41 ` Sagi Grimberg
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