From: Alan Stern <stern@rowland.harvard.edu>
To: Andrea Vai <andrea.vai@unipv.it>
Cc: Jens Axboe <axboe@kernel.dk>,
Damien Le Moal <Damien.LeMoal@wdc.com>,
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>, Ming Lei <ming.lei@redhat.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: Tue, 5 Nov 2019 13:31:46 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1911051326040.1678-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <0cd6ac36b7ab644576fc0f3f5bd4a880c33855d1.camel@unipv.it>
On Tue, 5 Nov 2019, Andrea Vai wrote:
> Il giorno lun, 04/11/2019 alle 13.20 -0500, Alan Stern ha scritto:
> > You should be able to do something like this:
> >
> > cd linux
> > patch -p1 </path/to/patch2
> >
> > and that should work with no errors. You don't need to use git to
> > apply a patch.
> >
> > In case that patch2 file was mangled somewhere along the way, I
> > have
> > attached a copy to this message.
>
> Ok, so the "patch" command worked, the kernel compiled and ran, but
> the test still failed (273, 108, 104, 260, 177, 236, 179, 1123, 289,
> 873 seconds to copy a 500MB file, vs. ~30 seconds with the "good"
> kernel).
>
> Let me know what else could I do,
I'm out of suggestions. If anyone else knows how to make a kernel with
no legacy queuing support -- only multiqueue -- issue I/O requests
sequentially, please speak up.
In the absence of any responses, after a week or so I will submit a
patch to revert the f664a3cc17b7 ("scsi: kill off the legacy IO path")
commit.
Alan Stern
next prev parent reply other threads:[~2019-11-05 18:31 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 [this message]
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
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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