From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
Paolo Valente
<paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Fabio Checconi
<fchecconi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Arianna Avanzini
<avanzini.arianna-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Paolo Valente <posta_paolo-whZMOeQn8C0@public.gmane.org>
Subject: Re: [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler
Date: Wed, 4 Jun 2014 07:53:30 -0700 [thread overview]
Message-ID: <20140604145330.GA2955@infradead.org> (raw)
In-Reply-To: <20140604145053.GE5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
On Wed, Jun 04, 2014 at 10:50:53AM -0400, Tejun Heo wrote:
> Hmmm... the biggest thing is ioscheds. They heavily rely on being
> strongly synchronized and are pretty important for rotating rusts.
> Maybe they can be made to work with blk-mq by forcing single queue or
> something but do we wnat that?
Jens is planning to add an (optional) I/O scheduler to blk-mq, and
that is indeed required for proper disk support. I don't think there
even is a need to limit it to a single queue technically, although
devices that support multiple queues are unlikely to need I/O
scheduling.
next prev parent reply other threads:[~2014-06-04 14:53 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20140528221929.GG1419@htj.dyndns.org>
[not found] ` <20140528221929.GG1419-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Paolo Valente
[not found] ` <1401354343-5527-1-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 01/12] block: introduce the BFQ-v0 I/O scheduler Paolo Valente
[not found] ` <1401354343-5527-2-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:36 ` Tejun Heo
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 02/12] block, bfq: add full hierarchical scheduling and cgroups support Paolo Valente
[not found] ` <1401354343-5527-3-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:37 ` Tejun Heo
[not found] ` <20140530153718.GB24871@htj.dyndns.org>
[not found] ` <20140530153718.GB24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 15:39 ` Tejun Heo
2014-05-30 21:49 ` Paolo Valente
[not found] ` <20140530153943.GC24871@htj.dyndns.org>
[not found] ` <20140530153943.GC24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 21:49 ` Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 03/12] block, bfq: improve throughput boosting Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 04/12] block, bfq: modify the peak-rate estimator Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 05/12] block, bfq: add more fairness to boost throughput and reduce latency Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 06/12] block, bfq: improve responsiveness Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 07/12] block, bfq: reduce I/O latency for soft real-time applications Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 08/12] block, bfq: preserve a low latency also with NCQ-capable drives Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 09/12] block, bfq: reduce latency during request-pool saturation Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 10/12] block, bfq: add Early Queue Merge (EQM) Paolo Valente
[not found] ` <1401354343-5527-11-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-01 0:03 ` Tejun Heo
[not found] ` <20140601000331.GA29085@htj.dyndns.org>
[not found] ` <20140601000331.GA29085-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 9:46 ` Paolo Valente
[not found] ` <3B7B1A46-46EB-4C52-A52C-4F79C71D14C2@unimore.it>
[not found] ` <3B7B1A46-46EB-4C52-A52C-4F79C71D14C2-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 16:28 ` Tejun Heo
[not found] ` <20140603162844.GD26210-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 11:47 ` Paolo Valente
[not found] ` <91383F1F-69C3-4B88-B51E-30204818F1AB-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-04 13:04 ` Tejun Heo
[not found] ` <20140604130446.GA5004@htj.dyndns.org>
[not found] ` <20140604130446.GA5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-16 11:23 ` Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 11/12] block, bfq: boost the throughput on NCQ-capable flash-based devices Paolo Valente
2014-05-29 9:05 ` [PATCH RFC - TAKE TWO - 12/12] block, bfq: boost the throughput with random I/O on NCQ-capable HDDs Paolo Valente
2014-05-30 16:07 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Tejun Heo
[not found] ` <20140530160712.GG24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 22:23 ` Paolo Valente
[not found] ` <464F6CBE-A63E-46EF-A90D-BF8450430444-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 23:28 ` Tejun Heo
[not found] ` <20140530232804.GA5057@htj.dyndns.org>
[not found] ` <20140530232804.GA5057-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 23:54 ` Paolo Valente
2014-06-02 11:14 ` Pavel Machek
[not found] ` <20140602111432.GA3737@amd.pavel.ucw.cz>
[not found] ` <20140602111432.GA3737-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-02 13:02 ` Pavel Machek
[not found] ` <20140602130226.GA14654-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-03 16:54 ` Paolo Valente
[not found] ` <FCFE0106-A4DD-4DEF-AAAE-040F3823A447-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 20:40 ` Pavel Machek
2014-06-04 8:39 ` Pavel Machek
2014-06-04 9:08 ` Pavel Machek
2014-06-04 10:03 ` BFQ speed tests [was Re: [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler] Pavel Machek
[not found] ` <20140604100358.GA4799@amd.pavel.ucw.cz>
[not found] ` <20140604100358.GA4799-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-04 10:24 ` Paolo Valente
[not found] ` <4888F93F-D58D-48DD-81A6-A6D61C452D92-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-04 11:59 ` Takashi Iwai
[not found] ` <s5hsink3mxk.wl%tiwai-l3A5Bk7waGM@public.gmane.org>
2014-06-04 12:12 ` Paolo Valente
2014-06-11 20:45 ` Paolo Valente
[not found] ` <6A4905B2-ACAA-419D-9C83-659BE9A5B20B-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-13 16:21 ` Takashi Iwai
2014-06-11 20:39 ` Paolo Valente
2014-06-02 17:33 ` [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Tejun Heo
[not found] ` <20140602173332.GB8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-03 4:12 ` Mike Galbraith
2014-06-04 22:31 ` Pavel Machek
[not found] ` <20140604223152.GA7881-tWAi6jLit6GreWDznjuHag@public.gmane.org>
2014-06-05 2:14 ` Jens Axboe
2014-05-31 0:48 ` Jens Axboe
[not found] ` <538926F6.7080409@kernel.dk>
[not found] ` <538926F6.7080409-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-05-31 5:16 ` Tejun Heo
[not found] ` <20140531051635.GA19925@mtj.dyndns.org>
[not found] ` <20140531051635.GA19925-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 14:29 ` Jens Axboe
[not found] ` <20140602172454.GA8912@htj.dyndns.org>
[not found] ` <20140602172454.GA8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 17:32 ` Jens Axboe
[not found] ` <538CB515.3090700@kernel.dk>
[not found] ` <538CB515.3090700-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 17:42 ` Tejun Heo
[not found] ` <20140602174250.GC8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 17:46 ` Jens Axboe
[not found] ` <538CB87C.7030600-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 18:51 ` Tejun Heo
[not found] ` <20140602185138.GD8912@htj.dyndns.org>
[not found] ` <20140602185138.GD8912-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 20:57 ` Jens Axboe
[not found] ` <20140602205713.GB8357-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-04 14:31 ` Christoph Hellwig
[not found] ` <20140604143136.GA1920@infradead.org>
[not found] ` <20140604143136.GA1920-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-06-04 14:50 ` Tejun Heo
[not found] ` <20140604145053.GE5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 14:53 ` Christoph Hellwig [this message]
[not found] ` <20140604145330.GA2955-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-06-04 14:58 ` Tejun Heo
[not found] ` <20140604145829.GF5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 17:51 ` Christoph Hellwig
[not found] ` <538C8A47.1050502-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-02 17:24 ` Tejun Heo
2014-06-17 15:55 ` Paolo Valente
[not found] ` <0A5218F8-0215-4B4F-959B-EE5AAEFC164A-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-19 1:46 ` Tejun Heo
[not found] ` <20140619014600.GA20100@mtj.dyndns.org>
[not found] ` <20140619014600.GA20100-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-19 1:49 ` Tejun Heo
2014-06-19 2:29 ` Jens Axboe
[not found] ` <53A24B1C.1070004-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
2014-06-23 13:53 ` Paolo Valente
[not found] ` <8F719638-0CD7-4BD2-8F4F-088913A0EE2D-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-23 19:20 ` Tejun Heo
[not found] ` <20140623192022.GA19660@mtj.dyndns.org>
[not found] ` <20140623192022.GA19660-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-07-09 20:54 ` Paolo Valente
[not found] ` <1401354343-5527-7-git-send-email-paolo.valente@unimore.it>
[not found] ` <1401354343-5527-7-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:41 ` [PATCH RFC - TAKE TWO - 06/12] block, bfq: improve responsiveness Tejun Heo
[not found] ` <1401354343-5527-12-git-send-email-paolo.valente@unimore.it>
[not found] ` <1401354343-5527-12-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:46 ` [PATCH RFC - TAKE TWO - 11/12] block, bfq: boost the throughput on NCQ-capable flash-based devices Tejun Heo
[not found] ` <20140530154654.GE24871-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-05-30 22:01 ` Paolo Valente
2014-05-31 11:52 ` Tejun Heo
[not found] ` <20140531115216.GB5057-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-02 9:26 ` Paolo Valente
[not found] ` <36BFDB73-AEC2-4B87-9FD6-205E9431E722-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-03 17:11 ` Tejun Heo
[not found] ` <20140603171124.GE26210@htj.dyndns.org>
[not found] ` <20140603171124.GE26210-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-04 7:29 ` Paolo Valente
[not found] ` <03CDD106-DB18-4E8F-B3D6-2AAD45782A06-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-04 13:56 ` Tejun Heo
[not found] ` <20140604135627.GB5004@htj.dyndns.org>
[not found] ` <20140604135627.GB5004-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-06-16 10:46 ` Paolo Valente
[not found] ` <D163E069-ED77-4BF5-A488-9A90C41C60C1-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-06-19 1:14 ` Tejun Heo
[not found] ` <1401354343-5527-13-git-send-email-paolo.valente@unimore.it>
[not found] ` <1401354343-5527-13-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-30 15:51 ` [PATCH RFC - TAKE TWO - 12/12] block, bfq: boost the throughput with random I/O on NCQ-capable HDDs Tejun Heo
2014-05-31 13:34 ` Tejun Heo
[not found] ` <1401354343-5527-9-git-send-email-paolo.valente@unimore.it>
[not found] ` <1401354343-5527-9-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-31 13:48 ` [PATCH RFC - TAKE TWO - 08/12] block, bfq: preserve a low latency also with NCQ-capable drives Tejun Heo
[not found] ` <20140531134823.GB24557-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 9:58 ` Paolo Valente
[not found] ` <1401354343-5527-10-git-send-email-paolo.valente@unimore.it>
[not found] ` <1401354343-5527-10-git-send-email-paolo.valente-rcYM44yAMweonA0d6jMUrA@public.gmane.org>
2014-05-31 13:54 ` [PATCH RFC - TAKE TWO - 09/12] block, bfq: reduce latency during request-pool saturation Tejun Heo
[not found] ` <20140531135402.GC24557-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2014-06-02 9:54 ` Paolo Valente
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