From: Luben Tuikov <luben@splentec.com>
To: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Russell King <rmk@arm.linux.org.uk>, linux-scsi@vger.kernel.org
Subject: Re: SCSI woes (followup)
Date: Tue, 24 Sep 2002 13:57:51 -0400 [thread overview]
Message-ID: <3D90A79F.47A37BC2@splentec.com> (raw)
In-Reply-To: 200209241346.g8ODkER09516@localhost.localdomain
James Bottomley wrote:
>
> I think it's method of operation is misplaced. What it should probably be
> doing is simply adding a doorlock to the head of the queue and then go back
> around. Since we know the doorlock now preceeds the command that instigated
> the issue the door should be locked before anything else happens. It should
> simply loop around and process the door lock request so it doesn't have to
> wait for anything else to occur (any commands which come down in the interim
> should go on the queue tail).
>
Similar mechanism exists in some current SCSI transport/interconnect
protocols.
The notion of _an_immediate_command_ does exactly that.
Add a flag, say unsigned I:1; to scsi_cmnd, which if set to 1, will
make add it to the head of the queue, irrespective of its serial
number, else the command is added according to its serial number
in the pending commands queue.
--
Luben
next prev parent reply other threads:[~2002-09-24 17:57 UTC|newest]
Thread overview: 269+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-24 11:35 SCSI woes (followup) Russell King
2002-09-24 13:46 ` James Bottomley
2002-09-24 13:58 ` Russell King
2002-09-24 14:29 ` James Bottomley
2002-09-24 18:16 ` Luben Tuikov
2002-09-24 18:18 ` Patrick Mansfield
2002-09-24 19:01 ` Russell King
2002-09-24 19:08 ` Mike Anderson
2002-09-24 19:21 ` Russell King
2002-09-24 19:32 ` Patrick Mansfield
2002-09-24 20:00 ` Russell King
2002-09-24 22:23 ` Patrick Mansfield
2002-09-24 23:04 ` Russell King
2002-09-24 22:39 ` Russell King
2002-09-24 23:14 ` James Bottomley
2002-09-24 23:26 ` Mike Anderson
2002-09-24 23:31 ` James Bottomley
2002-09-24 23:56 ` Mike Anderson
2002-09-24 23:33 ` Russell King
2002-09-25 0:47 ` Mike Anderson
2002-09-25 8:45 ` Russell King
2002-09-25 2:18 ` Doug Ledford
2002-09-25 14:41 ` Russell King
2002-09-24 23:33 ` Mike Anderson
2002-09-24 23:45 ` Russell King
2002-09-25 0:08 ` Patrick Mansfield
2002-09-25 8:41 ` Russell King
2002-09-25 17:22 ` Patrick Mansfield
2002-09-25 12:46 ` Russell King
2002-09-24 17:57 ` Luben Tuikov [this message]
2002-09-24 18:39 ` Mike Anderson
2002-09-24 18:49 ` Luben Tuikov
[not found] <dledford@redhat.com>
2002-10-02 0:28 ` PATCH: scsi device queue depth adjustability patch Doug Ledford
2002-10-02 1:16 ` Alan Cox
2002-10-02 1:41 ` Doug Ledford
2002-10-02 13:44 ` Alan Cox
2002-10-02 21:41 ` James Bottomley
2002-10-02 22:18 ` Doug Ledford
2002-10-02 23:19 ` James Bottomley
2002-10-03 12:46 ` James Bottomley
2002-10-03 16:35 ` Doug Ledford
2002-10-04 1:40 ` Jeremy Higdon
2002-10-03 14:25 ` James Bottomley
2002-10-03 16:41 ` Doug Ledford
2002-10-03 17:00 ` James Bottomley
2002-10-16 21:35 ` scsi_scan.c question Doug Ledford
2002-10-16 21:41 ` James Bottomley
2002-10-17 0:18 ` Doug Ledford
2002-10-16 21:57 ` Patrick Mansfield
2002-10-18 15:57 ` Patrick Mansfield
2002-11-18 0:27 ` aic7xxx_biosparam Doug Ledford
2002-11-18 0:36 ` aic7xxx_biosparam J.E.J. Bottomley
2002-11-18 2:46 ` aic7xxx_biosparam Doug Ledford
2002-11-18 3:20 ` aic7xxx_biosparam J.E.J. Bottomley
2002-11-18 3:26 ` aic7xxx_biosparam Doug Ledford
2002-11-18 0:43 ` aic7xxx_biosparam Andries Brouwer
2002-11-18 2:47 ` aic7xxx_biosparam Doug Ledford
2002-11-18 0:57 ` aic7xxx_biosparam Alan Cox
2002-11-18 2:34 ` aic7xxx_biosparam Doug Ledford
2002-12-21 1:22 ` scsi_scan changes Doug Ledford
2002-12-21 1:27 ` James Bottomley
-- strict thread matches above, loose matches on Subject: below --
2002-11-21 15:16 [PATCH] turn scsi_allocate_device into readable code Christoph Hellwig
2002-11-21 15:36 ` Doug Ledford
2002-11-21 15:39 ` J.E.J. Bottomley
2002-11-21 15:49 ` Doug Ledford
2002-11-21 16:12 ` J.E.J. Bottomley
2002-11-21 17:08 ` [PATCH] current scsi-misc-2.5 include files Patrick Mansfield
2002-11-16 19:40 [PATCH] removel useless mod use count manipulation Christoph Hellwig
2002-11-17 2:59 ` Doug Ledford
2002-11-17 17:31 ` J.E.J. Bottomley
2002-11-17 18:14 ` Doug Ledford
2002-11-17 12:40 ` Douglas Gilbert
2002-11-17 12:48 ` Christoph Hellwig
2002-11-17 13:38 ` Douglas Gilbert
2002-11-15 20:34 [RFC][PATCH] move dma_mask into struct device J.E.J. Bottomley
2002-11-16 0:19 ` Mike Anderson
2002-11-16 14:48 ` J.E.J. Bottomley
2002-11-16 20:33 ` Patrick Mansfield
2002-11-17 15:07 ` J.E.J. Bottomley
2002-11-06 22:18 [PATCH] add request prep functions to SCSI J.E.J. Bottomley
2002-11-06 23:16 ` Doug Ledford
2002-11-06 23:43 ` J.E.J. Bottomley
2002-11-07 21:45 ` Mike Anderson
2002-11-06 4:24 [PATCH] fix 2.5 scsi queue depth setting Patrick Mansfield
2002-11-06 4:35 ` Patrick Mansfield
2002-11-06 17:15 ` J.E.J. Bottomley
2002-11-06 17:47 ` J.E.J. Bottomley
2002-11-06 18:24 ` Patrick Mansfield
2002-11-06 18:32 ` J.E.J. Bottomley
2002-11-06 18:39 ` Patrick Mansfield
2002-11-06 18:50 ` J.E.J. Bottomley
2002-11-06 19:50 ` Patrick Mansfield
2002-11-06 20:45 ` Doug Ledford
2002-11-06 21:19 ` J.E.J. Bottomley
2002-11-06 20:50 ` Doug Ledford
[not found] <patmans@us.ibm.com>
2002-10-15 16:55 ` [RFC PATCH] consolidate SCSI-2 command lun setting Patrick Mansfield
2002-10-15 20:29 ` James Bottomley
2002-10-15 22:00 ` Patrick Mansfield
2002-10-30 16:58 ` [PATCH] 2.5 current bk fix setting scsi queue depths Patrick Mansfield
2002-10-30 17:17 ` James Bottomley
2002-10-30 18:05 ` Patrick Mansfield
2002-10-31 0:44 ` James Bottomley
2002-10-21 19:34 [PATCH] get rid of ->finish method for highlevel drivers Christoph Hellwig
2002-10-21 23:58 ` James Bottomley
2002-10-22 15:48 ` James Bottomley
2002-10-22 18:43 ` Patrick Mansfield
2002-10-22 23:17 ` Mike Anderson
2002-10-22 23:30 ` Doug Ledford
2002-10-23 14:16 ` James Bottomley
2002-10-23 15:13 ` Christoph Hellwig
2002-10-24 1:36 ` Patrick Mansfield
2002-10-24 23:20 ` Willem Riede
2002-10-24 23:36 ` Christoph Hellwig
2002-10-25 0:02 ` Willem Riede
2002-10-22 7:30 ` Mike Anderson
2002-10-22 11:14 ` Christoph Hellwig
2002-10-15 18:55 [patch 2.5] ips queue depths Jeffery, David
2002-10-15 19:30 ` Dave Hansen
2002-10-15 19:47 ` Doug Ledford
2002-10-15 20:04 ` Patrick Mansfield
2002-10-15 20:52 ` Doug Ledford
2002-10-15 23:30 ` Patrick Mansfield
2002-10-15 23:56 ` Luben Tuikov
2002-10-16 2:32 ` Doug Ledford
2002-10-16 19:04 ` Patrick Mansfield
2002-10-16 20:15 ` Doug Ledford
2002-10-17 0:39 ` Luben Tuikov
2002-10-17 17:01 ` Mike Anderson
2002-10-17 21:13 ` Luben Tuikov
2002-10-15 20:10 ` Mike Anderson
2002-10-15 20:24 ` Doug Ledford
2002-10-15 20:38 ` James Bottomley
2002-10-15 22:10 ` Mike Anderson
2002-10-16 1:04 ` James Bottomley
2002-10-15 20:24 ` Mike Anderson
2002-10-15 22:46 ` Doug Ledford
2002-10-15 20:26 ` Luben Tuikov
2002-10-15 21:27 ` Patrick Mansfield
2002-10-16 0:43 ` Luben Tuikov
2002-10-21 7:28 ` Mike Anderson
2002-10-21 16:16 ` Doug Ledford
2002-10-21 16:29 ` James Bottomley
2002-10-10 15:01 [PATCH] scsi host cleanup 3/3 (driver changes) Stephen Cameron
2002-10-10 16:46 ` Mike Anderson
2002-10-10 16:59 ` James Bottomley
2002-10-10 20:05 ` Mike Anderson
2002-09-30 21:06 [PATCH] first cut at fixing unable to requeue with no outstanding commands James Bottomley
2002-09-30 23:28 ` Mike Anderson
2002-10-01 0:38 ` James Bottomley
2002-10-01 15:01 ` Patrick Mansfield
2002-10-01 15:14 ` James Bottomley
2002-10-01 16:23 ` Mike Anderson
2002-10-01 16:30 ` James Bottomley
2002-10-01 20:18 ` Inhibit auto-attach of scsi disks ? Scott Merritt
2002-10-02 0:46 ` Alan Cox
2002-10-02 1:49 ` Scott Merritt
2002-10-02 1:58 ` Doug Ledford
2002-10-02 2:45 ` Scott Merritt
2002-10-02 13:40 ` Alan Cox
[not found] <200209091458.g89Evv806056@localhost.localdomain>
2002-09-09 16:56 ` [RFC] Multi-path IO in 2.5/2.6 ? Patrick Mansfield
2002-09-09 17:34 ` James Bottomley
2002-09-09 18:40 ` Mike Anderson
2002-09-10 13:02 ` Lars Marowsky-Bree
2002-09-10 16:03 ` Patrick Mansfield
2002-09-10 16:27 ` Mike Anderson
2002-09-10 0:08 ` Patrick Mansfield
2002-09-10 7:55 ` Jeremy Higdon
2002-09-10 13:04 ` Lars Marowsky-Bree
2002-09-10 16:20 ` Patrick Mansfield
2002-09-10 13:16 ` Lars Marowsky-Bree
2002-09-10 19:26 ` Patrick Mansfield
2002-09-11 14:20 ` James Bottomley
2002-09-11 19:17 ` Lars Marowsky-Bree
2002-09-11 19:37 ` James Bottomley
2002-09-11 19:52 ` Lars Marowsky-Bree
2002-09-11 21:38 ` Oliver Xymoron
2002-09-11 20:30 ` Doug Ledford
2002-09-11 21:17 ` Mike Anderson
2002-09-10 17:21 ` Patrick Mochel
2002-09-10 18:42 ` Patrick Mansfield
2002-09-10 19:00 ` Patrick Mochel
2002-09-10 19:37 ` Patrick Mansfield
2002-09-03 14:35 aic7xxx sets CDR offline, how to reset? James Bottomley
2002-09-03 18:23 ` Doug Ledford
2002-09-03 19:09 ` James Bottomley
2002-09-03 20:59 ` Alan Cox
2002-09-03 21:32 ` James Bottomley
2002-09-03 21:54 ` Alan Cox
2002-09-03 22:50 ` Doug Ledford
2002-09-03 23:28 ` Alan Cox
2002-09-04 7:40 ` Jeremy Higdon
2002-09-04 16:24 ` James Bottomley
2002-09-04 17:13 ` Mike Anderson
2002-09-05 9:50 ` Jeremy Higdon
2002-09-04 16:13 ` James Bottomley
2002-09-04 16:50 ` Justin T. Gibbs
2002-09-05 9:39 ` Jeremy Higdon
2002-09-05 13:35 ` Justin T. Gibbs
2002-09-05 23:56 ` Jeremy Higdon
2002-09-06 0:13 ` Justin T. Gibbs
2002-09-06 0:32 ` Jeremy Higdon
2002-09-03 21:13 ` Doug Ledford
2002-09-03 21:48 ` James Bottomley
2002-09-03 22:42 ` Doug Ledford
2002-09-03 22:52 ` Doug Ledford
2002-09-03 23:29 ` Alan Cox
2002-09-04 21:16 ` Luben Tuikov
2002-09-04 10:37 ` Andries Brouwer
2002-09-04 10:48 ` Doug Ledford
2002-09-04 11:23 ` Alan Cox
2002-09-04 16:25 ` Rogier Wolff
2002-09-04 19:34 ` Thunder from the hill
2002-09-03 21:24 ` Patrick Mansfield
2002-09-03 22:02 ` James Bottomley
2002-09-03 23:26 ` Alan Cox
2002-08-26 16:29 [RFC]: 64 bit LUN/Tags, dummy device in host_queue, host_lock <-> LLDD reentrancy Aron Zeh
2002-08-26 16:48 ` James Bottomley
2002-08-26 17:27 ` Mike Anderson
2002-08-26 19:00 ` James Bottomley
2002-08-26 20:57 ` Mike Anderson
2002-08-26 21:10 ` James Bottomley
2002-08-26 22:38 ` Mike Anderson
2002-08-26 22:56 ` Patrick Mansfield
2002-08-26 23:10 ` Doug Ledford
2002-08-28 14:38 ` James Bottomley
2002-08-26 21:15 ` Mike Anderson
2002-08-12 23:38 [PATCH] 2.5.31 scsi_error.c cleanup Mike Anderson
2002-08-22 14:05 ` James Bottomley
2002-08-22 16:34 ` Mike Anderson
2002-08-22 17:11 ` James Bottomley
2002-08-22 20:10 ` Mike Anderson
2002-08-05 23:53 When must the io_request_lock be held? Jamie Wellnitz
2002-08-06 17:58 ` Mukul Kotwani
2002-08-07 14:48 ` Doug Ledford
2002-08-07 15:26 ` James Bottomley
2002-08-07 16:18 ` Doug Ledford
2002-08-07 16:48 ` James Bottomley
2002-08-07 18:06 ` Mike Anderson
2002-08-07 23:17 ` James Bottomley
2002-08-08 19:28 ` Luben Tuikov
2002-08-07 16:55 ` Patrick Mansfield
[not found] <200206132126.g5DLQiQ24889@localhost.localdomain>
2002-06-13 21:50 ` Proposed changes to generic blk tag for use in SCSI (1/3) Doug Ledford
2002-06-13 22:09 ` James Bottomley
2002-06-11 2:46 James Bottomley
2002-06-11 5:50 ` Jens Axboe
2002-06-11 14:29 ` James Bottomley
2002-06-11 14:45 ` Jens Axboe
2002-06-11 16:39 ` James Bottomley
2002-06-13 21:01 ` Doug Ledford
2002-06-13 21:26 ` James Bottomley
2002-04-08 15:18 [RFC] Persistent naming of scsi devices sullivan
2002-04-08 15:04 ` Christoph Hellwig
2002-04-08 15:59 ` Matthew Jacob
2002-04-08 16:34 ` James Bottomley
2002-04-08 18:27 ` Patrick Mansfield
2002-04-08 19:17 ` James Bottomley
2002-04-09 0:22 ` Douglas Gilbert
2002-04-09 14:35 ` sullivan
2002-04-09 14:55 ` sullivan
2002-04-08 17:51 ` Oliver Neukum
2002-04-08 18:01 ` Christoph Hellwig
2002-04-08 18:18 ` Matthew Jacob
2002-04-08 18:28 ` James Bottomley
2002-04-08 18:34 ` Matthew Jacob
2002-04-08 19:07 ` James Bottomley
2002-04-08 20:41 ` Matthew Jacob
2002-04-08 18:45 ` Tigran Aivazian
2002-04-08 20:18 ` Eddie Williams
2002-04-09 0:48 ` Kurt Garloff
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3D90A79F.47A37BC2@splentec.com \
--to=luben@splentec.com \
--cc=James.Bottomley@SteelEye.com \
--cc=linux-scsi@vger.kernel.org \
--cc=rmk@arm.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).