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From: Bart Van Assche <bvanassche@acm.org>
To: Christoph Hellwig <hch@infradead.org>,
	Damien Le Moal <Damien.LeMoal@wdc.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Artem Bityutskiy <dedekind1@gmail.com>,
	Paolo Valente <paolo.valente@linaro.org>,
	Jens Axboe <axboe@kernel.dk>,
	linux-block <linux-block@vger.kernel.org>,
	linux-mmc <linux-mmc@vger.kernel.org>,
	"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
	Pavel Machek <pavel@ucw.cz>, Ulf Hansson <ulf.hansson@linaro.org>,
	Richard Weinberger <richard@nod.at>,
	Adrian Hunter <adrian.hunter@intel.com>, Jan Kara <jack@suse.cz>,
	"aherrmann@suse.com" <aherrmann@suse.com>,
	"mgorman@suse.com" <mgorman@suse.com>,
	Chunyan Zhang <zhang.chunyan@linaro.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bfq-iosched@googlegroups.com" <bfq-iosched@googlegroups.com>,
	"oleksandr@natalenko.name" <oleksandr@natalenko.name>,
	Mark Brown <broonie@kernel.org>
Subject: Re: [PATCH] block: BFQ default for single queue devices
Date: Wed, 03 Oct 2018 07:58:52 -0700	[thread overview]
Message-ID: <1538578732.205649.0.camel@acm.org> (raw)
In-Reply-To: <20181003125146.GA9313@infradead.org>

On Wed, 2018-10-03 at 05:51 -0700, Christoph Hellwig wrote:
> On Wed, Oct 03, 2018 at 07:42:15AM +0000, Damien Le Moal wrote:
> > Of note also is that host-managed like sequential zone devices are also likely
> > to show up soon with the work being done in the NVMe standard on the new "Zoned
> > namespace" feature proposal. These devices will also require a scheduler like
> > mq-deadline guaranteeing per-zone in-order delivery of sequential write
> > requests. Looking only at the number of queues of the device is not enough to
> > choose the best (most reasonnable/appropriate) scheduler.
> 
> We actually have a plan to avoid the need for a non-reordering scheduler
> there (including a Linux prototype for it).  Lets see if it survives the
> committee.

Has the work with the T10 committee to standardize the SCSI equivalent of anonymous
writes already started?

Thanks,

Bart.

WARNING: multiple messages have this Message-ID (diff)
From: Bart Van Assche <bvanassche@acm.org>
To: Christoph Hellwig <hch@infradead.org>,
	Damien Le Moal <Damien.LeMoal@wdc.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Artem Bityutskiy <dedekind1@gmail.com>,
	Paolo Valente <paolo.valente@linaro.org>,
	Jens Axboe <axboe@kernel.dk>,
	linux-block <linux-block@vger.kernel.org>,
	linux-mmc <linux-mmc@vger.kernel.org>,
	"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
	Pavel Machek <pavel@ucw.cz>, Ulf Hansson <ulf.hansson@linaro.org>,
	Richard Weinberger <richard@nod.at>,
	Adrian Hunter <adrian.hunter@intel.com>, Jan Kara <jack@suse.cz>,
	"aherrmann@suse.com" <aherrmann@suse.com>,
	"mgorman@suse.com" <mgorman@suse.com>,
	Chunyan Zhang <zhang.chunyan@linaro.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bfq-iosched@googlegroups.com" <bfq-iosched@googlegroups.com>,
	"oleksandr@natalenko.name" <oleksandr@n>
Subject: Re: [PATCH] block: BFQ default for single queue devices
Date: Wed, 03 Oct 2018 07:58:52 -0700	[thread overview]
Message-ID: <1538578732.205649.0.camel@acm.org> (raw)
In-Reply-To: <20181003125146.GA9313@infradead.org>

On Wed, 2018-10-03 at 05:51 -0700, Christoph Hellwig wrote:
> On Wed, Oct 03, 2018 at 07:42:15AM +0000, Damien Le Moal wrote:
> > Of note also is that host-managed like sequential zone devices are also likely
> > to show up soon with the work being done in the NVMe standard on the new "Zoned
> > namespace" feature proposal. These devices will also require a scheduler like
> > mq-deadline guaranteeing per-zone in-order delivery of sequential write
> > requests. Looking only at the number of queues of the device is not enough to
> > choose the best (most reasonnable/appropriate) scheduler.
> 
> We actually have a plan to avoid the need for a non-reordering scheduler
> there (including a Linux prototype for it).  Lets see if it survives the
> committee.

Has the work with the T10 committee to standardize the SCSI equivalent of anonymous
writes already started?

Thanks,

Bart.

  reply	other threads:[~2018-10-03 14:58 UTC|newest]

Thread overview: 89+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-02 12:43 [PATCH] block: BFQ default for single queue devices Linus Walleij
2018-10-02 12:43 ` Linus Walleij
2018-10-02 14:31 ` Jens Axboe
2018-10-02 14:31   ` Jens Axboe
2018-10-02 14:45   ` Linus Walleij
2018-10-02 14:45     ` Linus Walleij
2018-10-03  6:29   ` Paolo Valente
2018-10-03  6:29     ` Paolo Valente
2018-10-03  6:53     ` Linus Walleij
2018-10-03 13:25       ` Jan Kara
2018-10-04  7:45         ` Johannes Thumshirn
2018-10-04  7:45           ` Johannes Thumshirn
2018-10-04  8:24           ` Andreas Herrmann
2018-10-03  7:05     ` Artem Bityutskiy
2018-10-03  7:18       ` Linus Walleij
2018-10-03  7:42         ` Damien Le Moal
2018-10-03  7:42           ` Damien Le Moal
2018-10-03  8:28           ` Linus Walleij
2018-10-03  8:53             ` Damien Le Moal
2018-10-03  8:53               ` Damien Le Moal
2018-10-03  8:53               ` Damien Le Moal
2018-10-03 15:53             ` Paolo Valente
2018-10-03 15:53               ` Paolo Valente
2018-10-03 17:34               ` Bryan Gurney
2018-10-04  8:21                 ` Linus Walleij
2018-10-04  9:56                 ` Ulf Hansson
2018-10-03 12:51           ` Christoph Hellwig
2018-10-03 12:51             ` Christoph Hellwig
2018-10-03 14:58             ` Bart Van Assche [this message]
2018-10-03 14:58               ` Bart Van Assche
2018-10-03 15:01               ` Christoph Hellwig
2018-10-03 15:01                 ` Christoph Hellwig
2018-10-03 15:15                 ` Bart Van Assche
2018-10-03 15:15                   ` Bart Van Assche
2018-10-05  6:24                   ` Christoph Hellwig
2018-10-05  6:24                     ` Christoph Hellwig
2018-10-03 15:52           ` Paolo Valente
2018-10-03 15:52             ` Paolo Valente
2018-10-03 15:52             ` Paolo Valente
2018-10-03 11:49     ` Oleksandr Natalenko
2018-10-03 11:49       ` Oleksandr Natalenko
2018-10-03 14:51       ` Mark Brown
2018-10-03 15:55       ` Paolo Valente
2018-10-03 15:55         ` Paolo Valente
2018-10-03 16:00         ` Bart Van Assche
2018-10-03 16:04           ` Paolo Valente
2018-10-03 16:04             ` Paolo Valente
2018-10-04  7:38         ` Jan Kara
2018-10-04  8:14       ` Linus Walleij
2018-10-04 10:13         ` Mark Brown
2018-10-04 15:10           ` Bart Van Assche
2018-10-04 15:26             ` Mark Brown
2018-10-05  9:49         ` Pavel Machek
2018-10-04  8:25       ` Linus Walleij
2018-10-03 15:54     ` Bart Van Assche
2018-10-03 15:54       ` Bart Van Assche
2018-10-03 16:02       ` Paolo Valente
2018-10-03 16:02         ` Paolo Valente
2018-10-03 16:09         ` Paolo Valente
2018-10-03 17:22         ` Paolo Valente
2018-10-03 17:22           ` Paolo Valente
2018-10-04 19:25       ` Alan Cox
2018-10-04 19:25         ` Alan Cox
2018-10-04 20:09         ` Bart Van Assche
2018-10-04 20:39           ` Paolo Valente
2018-10-04 20:39             ` Paolo Valente
2018-10-04 22:42             ` Bart Van Assche
2018-10-05  9:16               ` Jan Kara
2018-10-06  3:12                 ` Bart Van Assche
2018-10-06  6:46                   ` Paolo Valente
2018-10-06  6:46                     ` Paolo Valente
2018-10-06  6:46                     ` Paolo Valente
2018-10-06 16:20                     ` Bart Van Assche
2018-10-06 16:20                       ` Bart Van Assche
2018-10-06 16:46                       ` Paolo Valente
2018-10-06 16:46                         ` Paolo Valente
2018-10-06 16:46                         ` Paolo Valente
2018-10-05  9:28               ` Paolo Valente
2018-10-05  9:28                 ` Paolo Valente
2018-10-05  6:24           ` Artem Bityutskiy
2018-10-04 20:19         ` Paolo Valente
2018-10-04 20:19           ` Paolo Valente
2018-10-02 21:28 ` Richard Weinberger
2018-10-02 21:28   ` Richard Weinberger
2018-10-03 15:51 ` Paolo Valente
2018-10-03 15:51   ` Paolo Valente
2018-10-03 15:51   ` Paolo Valente
2018-10-05  8:04 ` Pavel Machek
2018-10-05  8:04   ` Pavel Machek

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