From: Andrea Vai <andrea.vai@unipv.it>
To: Ming Lei <ming.lei@redhat.com>
Cc: Damien Le Moal <Damien.LeMoal@wdc.com>,
Alan Stern <stern@rowland.harvard.edu>,
Jens Axboe <axboe@kernel.dk>,
Johannes Thumshirn <jthumshirn@suse.de>,
USB list <linux-usb@vger.kernel.org>,
SCSI development list <linux-scsi@vger.kernel.org>,
Himanshu Madhani <himanshu.madhani@cavium.com>,
Hannes Reinecke <hare@suse.com>, Omar Sandoval <osandov@fb.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Greg KH <gregkh@linuxfoundation.org>,
Hans Holmberg <Hans.Holmberg@wdc.com>,
Kernel development list <linux-kernel@vger.kernel.org>
Subject: Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6
Date: Mon, 11 Nov 2019 11:50:49 +0100 [thread overview]
Message-ID: <928d17b00c66caeef30410cf5a472056ae3722d4.camel@unipv.it> (raw)
In-Reply-To: <20191109222828.GA30568@ming.t460p>
Il giorno dom, 10/11/2019 alle 06.28 +0800, Ming Lei ha scritto:
> On Thu, Nov 07, 2019 at 07:59:44PM +0100, Andrea Vai wrote:
> > [Sorry for the duplicate message, it didn't reach the lists due to
> > html formatting]
> > Il giorno gio 7 nov 2019 alle ore 08:54 Damien Le Moal
> > <Damien.LeMoal@wdc.com> ha scritto:
> > >
> > > On 2019/11/07 16:04, Andrea Vai wrote:
> > > > Il giorno mer, 06/11/2019 alle 22.13 +0000, Damien Le Moal ha
> scritto:
> > > >>
> > > >>
> > > >> Please simply try your write tests after doing this:
> > > >>
> > > >> echo mq-deadline > /sys/block/<name of your USB
> > > >> disk>/queue/scheduler
> > > >>
> > > >> And confirm that mq-deadline is selected with:
> > > >>
> > > >> cat /sys/block/<name of your USB disk>/queue/scheduler
> > > >> [mq-deadline] kyber bfq none
> > > >
> > > > ok, which kernel should I test with this: the fresh git
> cloned, or the
> > > > one just patched with Alan's patch, or doesn't matter which
> one?
> > >
> > > Probably all of them to see if there are any differences.
> >
> > with both kernels, the output of
> > cat /sys/block/sdh/queue/schedule
> >
> > already contains [mq-deadline]: is it correct to assume that the
> echo
> > command and the subsequent testing is useless? What to do now?
>
> Another thing we could try is to use 'none' via the following
> command:
>
> echo none > /sys/block/sdh/queue/scheduler #suppose 'sdh' points
> to the usb storage disk
>
> Because USB storage HBA is single hw queue, which depth is 1. This
> way
> should change to dispatch IO in the order of bio submission.
>
> Andrea, could you switch io scheduler to none and update us if
> difference
> can be made?
Of course I would to it, but I see that with the "good" kernel the
output of "cat /sys/block/sdf/queue/scheduler" (yes, now it's sdf) is
noop deadline [cfq]
, i.e. it doesn't show "none". Does it matter? (sorry if it's a silly
question)
Thanks, and bye
Andrea
next prev parent reply other threads:[~2019-11-11 10:50 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <307581a490b610c3025ee80f79a465a89d68ed19.camel@unipv.it>
2019-08-20 17:13 ` Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Alan Stern
2019-08-23 10:39 ` Andrea Vai
2019-08-23 20:42 ` Alan Stern
2019-08-26 6:09 ` Andrea Vai
2019-08-26 16:33 ` Alan Stern
2019-09-18 15:25 ` Andrea Vai
2019-09-18 16:30 ` Alan Stern
2019-09-19 7:33 ` Andrea Vai
2019-09-19 17:54 ` Alan Stern
2019-09-20 7:25 ` Andrea Vai
2019-09-20 7:44 ` Greg KH
2019-09-19 8:26 ` Damien Le Moal
2019-09-19 8:55 ` Ming Lei
2019-09-19 9:09 ` Damien Le Moal
2019-09-19 9:21 ` Ming Lei
2019-09-19 14:01 ` Alan Stern
2019-09-19 14:14 ` Damien Le Moal
2019-09-20 7:03 ` Andrea Vai
2019-09-25 19:30 ` Alan Stern
2019-09-25 19:36 ` Jens Axboe
2019-09-27 15:47 ` Andrea Vai
2019-11-04 16:00 ` Andrea Vai
2019-11-04 18:20 ` Alan Stern
2019-11-05 11:48 ` Andrea Vai
2019-11-05 18:31 ` Alan Stern
2019-11-05 23:29 ` Jens Axboe
2019-11-06 16:03 ` Alan Stern
2019-11-06 22:13 ` Damien Le Moal
2019-11-07 7:04 ` Andrea Vai
2019-11-07 7:54 ` Damien Le Moal
2019-11-07 18:59 ` Andrea Vai
2019-11-08 8:42 ` Damien Le Moal
2019-11-08 14:33 ` Jens Axboe
2019-11-11 10:46 ` Andrea Vai
2019-11-09 10:09 ` Ming Lei
2019-11-09 22:28 ` Ming Lei
2019-11-11 10:50 ` Andrea Vai [this message]
2019-11-11 11:05 ` Ming Lei
2019-11-11 11:13 ` Andrea Vai
2019-11-22 19:16 ` Andrea Vai
2019-11-23 7:28 ` Ming Lei
2019-11-23 15:44 ` Andrea Vai
2019-11-25 3:54 ` Ming Lei
2019-11-25 10:11 ` Andrea Vai
2019-11-25 10:29 ` Ming Lei
2019-11-25 14:58 ` Andrea Vai
2019-11-25 15:15 ` Ming Lei
2019-11-25 18:51 ` Andrea Vai
2019-11-26 2:32 ` Ming Lei
2019-11-26 7:46 ` Andrea Vai
2019-11-26 9:15 ` Ming Lei
2019-11-26 10:24 ` Ming Lei
2019-11-26 11:14 ` Andrea Vai
2019-11-27 2:05 ` Ming Lei
2019-11-27 9:39 ` Andrea Vai
2019-11-27 13:08 ` Ming Lei
2019-11-27 15:01 ` Andrea Vai
2019-11-27 0:21 ` Finn Thain
2019-11-27 8:14 ` AW: " Schmid, Carsten
2019-11-27 21:49 ` Finn Thain
2019-11-28 7:46 ` Andrea Vai
2019-11-28 8:12 ` AW: " Schmid, Carsten
2019-11-28 11:40 ` Andrea Vai
2019-11-28 17:39 ` Alan Stern
2019-11-28 9:17 ` Ming Lei
2019-11-28 17:34 ` Andrea Vai
2019-11-29 0:57 ` Ming Lei
2019-11-29 2:35 ` Ming Lei
2019-11-29 14:41 ` Andrea Vai
2019-12-03 2:23 ` Ming Lei
2019-12-10 7:35 ` Andrea Vai
2019-12-10 8:05 ` Ming Lei
2019-12-11 2:41 ` Theodore Y. Ts'o
2019-12-11 4:00 ` Ming Lei
2019-12-11 16:07 ` Theodore Y. Ts'o
2019-12-11 21:33 ` Ming Lei
2019-12-12 7:34 ` Andrea Vai
2019-12-18 8:25 ` Andrea Vai
2019-12-18 9:48 ` Ming Lei
[not found] ` <b1b6a0e9d690ecd9432025acd2db4ac09f834040.camel@unipv.it>
2019-12-23 13:08 ` Ming Lei
2019-12-23 14:02 ` Andrea Vai
2019-12-24 1:32 ` Ming Lei
2019-12-24 8:04 ` Andrea Vai
2019-12-24 8:47 ` Ming Lei
2019-12-23 16:26 ` Theodore Y. Ts'o
2019-12-23 16:29 ` Andrea Vai
2019-12-23 17:22 ` Theodore Y. Ts'o
2019-12-23 18:45 ` Andrea Vai
2019-12-23 19:53 ` Theodore Y. Ts'o
2019-12-24 1:27 ` Ming Lei
2019-12-24 6:49 ` Andrea Vai
2019-12-24 8:51 ` Andrea Vai
2019-12-24 9:35 ` Ming Lei
2019-12-25 5:17 ` Theodore Y. Ts'o
2019-12-26 2:27 ` Ming Lei
2019-12-26 3:30 ` Theodore Y. Ts'o
2019-12-26 8:37 ` Ming Lei
2020-01-07 7:51 ` Andrea Vai
[not found] ` <20200101074310.10904-1-hdanton@sina.com>
2020-01-01 13:53 ` slow IO on USB media Ming Lei
2019-11-29 11:44 ` AW: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Bernd Schubert
2019-12-02 7:01 ` Andrea Vai
2019-11-28 17:10 ` Andrea Vai
2019-07-02 10:46 Andrea Vai
2019-07-02 11:51 ` Johannes Thumshirn
2019-07-02 22:36 ` Andrea Vai
2019-07-03 7:29 ` Johannes Thumshirn
2019-07-03 14:23 ` Alan Stern
2019-07-06 22:06 ` Andrea Vai
2019-07-08 15:38 ` Alan Stern
2019-08-09 12:07 ` Andrea Vai
2019-08-13 19:52 ` Alan Stern
2019-07-02 12:01 ` Ming Lei
2019-07-02 22:39 ` Andrea Vai
2019-07-03 2:01 ` Ming Lei
2019-07-03 5:11 ` Andrea Vai
2019-07-03 6:36 ` Ming Lei
2019-07-03 15:27 ` Chris Murphy
2019-07-06 9:33 ` Andrea Vai
2019-07-08 1:01 ` Ming Lei
2019-07-09 21:18 ` Andrea Vai
2019-07-10 2:44 ` Ming Lei
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