From: Andre Hedrick <andre@linux-ide.org>
To: Jens Axboe <axboe@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linus Torvalds <torvalds@transmeta.com>,
james <jdickens@ameritech.net>, Ingo Molnar <mingo@elte.hu>,
Jeff Garzik <jgarzik@pobox.com>,
Larry Kessler <kessler@us.ibm.com>,
linux-kernel mailing list <linux-kernel@vger.kernel.org>,
"Andrew V. Savochkin" <saw@saw.sw.com.sg>,
Rusty Russell <rusty@rustcorp.com.au>,
Richard J Moore <richardj_moore@uk.ibm.com>
Subject: Re: v2.6 vs v3.0
Date: Mon, 30 Sep 2002 02:53:29 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.10.10209300235480.13669-100000@master.linux-ide.org> (raw)
In-Reply-To: <20020930075625.GH1014@suse.de>
On Mon, 30 Sep 2002, Jens Axboe wrote:
> On Sun, Sep 29 2002, Alan Cox wrote:
> > On Sun, 2002-09-29 at 18:42, Linus Torvalds wrote:
> > > I can say that the IDE code is the same code that is in 2.4.x, so if
> > > you're comfortable with 2.4.x wrt IDE, then you should be comfy with
> > > 2.5.x too.
> >
> > *NO*
> >
> > The IDE code is the experimental code in 2.4-ac. It is _NOT_ the IDE
> > code in 2.4 and its a lot less tested. I don't think it has any
> > corruption bugs but it is most definitely not the base 2.4 code and has
> > plenty of non corruption bugs (PCMCIA hang, taskfile write hang, irq
> > blocking performance problems)
>
> 2.5 at least does not have the taskfile hang, because I killed taskfile
> io.
Great :-/ Now that you have restored the "rq->wrq" aka working copy of
the request which in its past life under PIO only updated to block when
the entire request was completed. So there are no partial completions
possible given the old method in the legacy path.
One of the issues Linus kick my can over was the "requirement" of partial
completeions. What I need rom block is a way to know how much is
completed of the original total request. So whatever value is the
original rq->nr_sectors assigned to "TF.2/HF.2" or nsector_offset(s),
needs to be carried in block and updated to reflect how much more is
remaining of this CDB task.
I do not care if you call it "rq->dumbass_accounting_for_andre", but
provide this dummy accounting variable in "struct request" and I will be
happy. This has nothing to do with bio or bh segments from the kernel.
It is everything about device side accounting carried by block; whereas,
the ll_driver can use it to determine what or if there is to be another
interrupt.
Why are we getting lost interrupts?
Because there is a beautiful "data-block completion" v/s "immediate
interrupt assertion" race between the device and the kernel. So please
provide a counter which can be used to determine where the interrupt
driven partial completion model the driver is wrt the device/request.
Jens, not asking for much.
Otherwise the ADMA/VDMA is not doable period.
Cheers,
Andre Hedrick
LAD Storage Consulting Group
next prev parent reply other threads:[~2002-09-30 9:50 UTC|newest]
Thread overview: 212+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-24 1:54 [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAID device driver Larry Kessler
2002-09-24 2:22 ` Jeff Garzik
2002-09-26 15:52 ` Alan Cox
2002-09-26 22:55 ` [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAIDdevice driver Larry Kessler
2002-09-26 22:58 ` Jeff Garzik
2002-09-26 23:07 ` Linus Torvalds
2002-09-27 2:27 ` Jeff Garzik
2002-09-27 4:45 ` Linus Torvalds
2002-09-28 7:46 ` Ingo Molnar
2002-09-28 9:16 ` jw schultz
2002-09-30 14:05 ` Denis Vlasenko
2002-09-30 10:22 ` Tomas Szepe
2002-09-30 11:10 ` jw schultz
2002-09-30 11:17 ` Adrian Bunk
2002-09-30 19:48 ` Rik van Riel
2002-09-30 20:30 ` Christoph Hellwig
2002-09-28 15:40 ` Kernel version [Was: Re: [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAIDdevice driver] Horst von Brand
2002-09-29 1:31 ` v2.6 vs v3.0 Linus Torvalds
2002-09-29 6:14 ` james
2002-09-29 6:55 ` Andre Hedrick
2002-09-29 12:59 ` Gerhard Mack
2002-09-29 13:46 ` Dr. David Alan Gilbert
2002-09-29 14:06 ` Wakko Warner
2002-09-29 15:42 ` Jens Axboe
2002-09-29 16:21 ` Alan Cox
2002-09-29 16:17 ` Jens Axboe
2002-09-30 0:39 ` Jeff Chua
2002-09-29 16:22 ` Dave Jones
2002-09-29 16:26 ` Jens Axboe
2002-09-29 21:46 ` Matthias Andree
2002-09-30 7:05 ` Michael Clark
2002-09-30 7:22 ` Andrew Morton
2002-09-30 13:08 ` Kevin Corry
2002-09-30 13:05 ` Kevin Corry
2002-09-30 13:49 ` Michael Clark
2002-09-30 14:26 ` Kevin Corry
2002-09-30 13:59 ` Michael Clark
2002-09-30 15:50 ` Kevin Corry
2002-09-29 17:06 ` Jochen Friedrich
2002-09-29 15:18 ` Trever L. Adams
2002-09-29 15:45 ` Jens Axboe
2002-09-29 15:59 ` Trever L. Adams
2002-09-29 16:06 ` Jens Axboe
2002-09-29 16:13 ` Trever L. Adams
2002-09-30 6:54 ` Kai Henningsen
2002-09-30 18:40 ` Bill Davidsen
2002-10-01 12:38 ` Matthias Andree
2002-10-04 19:58 ` Bill Davidsen
2002-09-29 17:42 ` Linus Torvalds
2002-09-29 17:54 ` Rik van Riel
2002-09-29 18:24 ` Alan Cox
2002-09-30 7:56 ` Jens Axboe
2002-09-30 9:53 ` Andre Hedrick [this message]
2002-09-30 11:54 ` Jens Axboe
2002-09-30 12:58 ` Alan Cox
2002-09-30 13:05 ` Jens Axboe
2002-10-01 2:17 ` Andre Hedrick
2002-09-30 16:39 ` jbradford
2002-09-30 16:47 ` Pau Aliagas
2002-09-29 7:16 ` jbradford
2002-09-29 8:08 ` Jeff Garzik
2002-09-29 8:17 ` David S. Miller
2002-09-29 9:12 ` Jens Axboe
2002-09-29 11:19 ` Murray J. Root
2002-09-29 15:50 ` Jens Axboe
2002-09-30 7:01 ` Kai Henningsen
2002-09-29 16:04 ` Zwane Mwaikambo
2002-09-29 14:56 ` Alan Cox
2002-09-29 15:38 ` Jens Axboe
2002-09-29 16:30 ` Dave Jones
2002-09-29 16:42 ` Bjoern A. Zeeb
2002-09-29 21:16 ` Russell King
2002-09-29 21:32 ` Alan Cox
2002-09-29 21:49 ` steve
2002-09-29 21:52 ` Matthias Andree
2002-09-30 7:31 ` Tomas Szepe
2002-09-30 15:33 ` Jan Harkes
2002-09-30 18:13 ` Jeff Willis
2002-09-29 17:48 ` Linus Torvalds
2002-09-29 18:13 ` Jaroslav Kysela
2002-09-30 19:32 ` Bill Davidsen
2002-10-01 6:26 ` Jens Axboe
2002-10-01 7:54 ` Mikael Pettersson
2002-10-01 8:27 ` Jens Axboe
2002-10-01 8:44 ` jbradford
2002-10-01 11:31 ` Alan Cox
2002-10-01 11:25 ` Jens Axboe
2002-09-29 15:34 ` Andi Kleen
2002-09-29 17:26 ` Jochen Friedrich
2002-09-29 17:35 ` Jeff Garzik
2002-09-30 0:00 ` Andi Kleen
2002-10-01 19:28 ` IPv6 stability (success story ;) Petr Baudis
2002-09-29 9:15 ` v2.6 vs v3.0 Jens Axboe
2002-09-29 19:53 ` james
2002-09-29 15:26 ` Matthias Andree
2002-09-29 16:24 ` Alan Cox
2002-09-29 22:00 ` Matthias Andree
2002-09-30 19:02 ` Bill Davidsen
2002-09-30 18:37 ` Bill Davidsen
2002-10-03 15:51 ` [OT] 2.6 not 3.0 - (WAS Re: [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAIDdevice) jbradford
2002-10-03 15:57 ` Linus Torvalds
2002-10-03 16:16 ` [OT] 2.6 not 3.0 - (WAS Re: [PATCH-RFC] 4 of 4 - New problem jbradford
2002-10-03 22:30 ` Greg KH
2002-10-04 6:33 ` jbradford
2002-10-04 6:37 ` Greg KH
2002-10-04 7:17 ` jbradford
2002-10-04 7:30 ` Greg KH
2002-10-03 16:37 ` [OT] 2.6 not 3.0 - (WAS Re: [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAIDdevice) Alan Cox
2002-10-03 16:56 ` Linus Torvalds
2002-10-03 17:40 ` Alan Cox
2002-10-03 19:55 ` jlnance
2002-10-03 16:51 ` Dave Jones
2002-10-03 17:04 ` Alan Cox
2002-10-03 20:43 ` Andrew Morton
2002-10-03 22:05 ` Dave Jones
2002-10-04 3:46 ` Andreas Boman
2002-10-04 7:44 ` jbradford
2002-10-03 19:51 ` Rik van Riel
2002-10-04 22:26 ` [OT] 2.6 not 3.0 - (NUMA) Martin J. Bligh
2002-10-04 23:13 ` Linus Torvalds
2002-10-05 0:21 ` Martin J. Bligh
2002-10-05 0:36 ` Linus Torvalds
2002-10-05 1:25 ` Michael Hohnbaum
2002-10-05 20:30 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 - (NUMA)) Rob Landley
2002-10-06 2:15 ` Andrew Morton
2002-10-06 9:42 ` Russell King
2002-10-06 17:06 ` Alan Cox
2002-10-06 13:44 ` Oliver Neukum
2002-10-06 15:19 ` Martin J. Bligh
2002-10-06 15:14 ` Oliver Neukum
2002-10-07 8:08 ` Helge Hafting
2002-10-07 9:18 ` Oliver Neukum
2002-10-07 14:11 ` Jan Hudec
2002-10-07 15:01 ` Jesse Pollard
2002-10-07 15:34 ` Jan Hudec
2002-10-08 3:12 ` [OT] " Scott Mcdermott
2002-10-10 23:49 ` Mike Fedyk
2002-10-07 15:15 ` Martin J. Bligh
2002-10-08 13:49 ` Helge Hafting
2002-10-07 17:43 ` Daniel Phillips
2002-10-07 18:31 ` Andrew Morton
2002-10-07 18:51 ` Linus Torvalds
2002-10-07 20:14 ` Alan Cox
2002-10-07 20:31 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not3.0 " Andrew Morton
2002-10-07 20:46 ` Linus Torvalds
2002-10-07 20:44 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 " Linus Torvalds
2002-10-07 21:16 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not3.0 " Andrew Morton
2002-10-07 23:47 ` jw schultz
2002-10-11 0:02 ` Mike Fedyk
2002-10-07 18:58 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 " Chris Friesen
2002-10-07 19:21 ` Daniel Phillips
2002-10-07 19:35 ` Linus Torvalds
2002-10-08 0:39 ` Theodore Ts'o
2002-10-08 2:59 ` Andrew Morton
2002-10-08 16:15 ` Theodore Ts'o
2002-10-08 19:39 ` Andrew Morton
2002-10-08 17:06 ` Rob Landley
2002-10-07 19:36 ` Andrew Morton
2002-10-08 2:36 ` Simon Kirby
2002-10-08 2:47 ` Daniel Phillips
2002-10-08 2:50 ` Andrew Morton
2002-10-08 2:54 ` Simon Kirby
2002-10-08 3:00 ` Andrew Morton
2002-10-08 16:17 ` Theodore Ts'o
2002-10-08 12:49 ` jlnance
2002-10-08 17:09 ` Andrew Morton
2002-10-10 20:53 ` Thomas Zimmerman
2002-10-08 13:54 ` Helge Hafting
2002-10-08 15:31 ` Andreas Dilger
2002-10-07 19:05 ` Daniel Phillips
2002-10-07 19:24 ` Linus Torvalds
2002-10-07 20:02 ` Daniel Phillips
2002-10-07 20:14 ` Andrew Morton
2002-10-07 20:22 ` Daniel Phillips
2002-10-07 20:28 ` Linus Torvalds
2002-10-07 21:16 ` Daniel Phillips
2002-10-07 21:55 ` Linus Torvalds
2002-10-07 22:02 ` Daniel Phillips
2002-10-07 22:12 ` Andrew Morton
2002-10-08 8:49 ` Padraig Brady
2002-10-07 22:14 ` Charles Cazabon
2002-10-30 18:26 ` Lee Leahu
2002-10-06 6:33 ` Martin J. Bligh
2002-10-07 5:28 ` John Alvord
2002-10-07 8:39 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 n Giuliano Pochini
2002-10-07 13:56 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 - (NUMA)) Jesse Pollard
2002-10-07 14:03 ` Rob Landley
2002-10-08 22:14 ` Jesse Pollard
2002-10-08 19:11 ` Rob Landley
2002-10-09 8:17 ` Alexander Kellett
2002-10-07 18:22 ` Daniel Phillips
2002-10-08 8:19 ` Jan Hudec
2002-10-11 23:53 ` Hans Reiser
2002-10-11 20:26 ` Rob Landley
2002-10-12 4:14 ` Nick LeRoy
2002-10-13 17:27 ` Rob Landley
2002-10-12 10:03 ` Hans Reiser
2002-10-13 17:32 ` Rob Landley
2002-10-13 23:51 ` Hans Reiser
2002-10-14 16:33 ` Rob Landley
2002-10-14 7:10 ` Nikita Danilov
2002-10-21 15:36 ` [OT] Please don't call it 3.0!! (was Re: The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 - (NUMA))) Calin A. Culianu
2002-10-21 16:20 ` Wakko Warner
2002-10-12 11:42 ` The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0 - (NUMA)) Matthias Andree
2002-10-12 14:56 ` Hugh Dickins
2002-09-27 11:32 ` [PATCH-RFC] 4 of 4 - New problem logging macros, SCSI RAIDdevice driver Alan Cox
[not found] <fa.e52m04v.plkfqo@ifi.uio.no>
[not found] ` <fa.jgmettv.1hku79s@ifi.uio.no>
2002-09-30 0:16 ` v2.6 vs v3.0 walt
2002-09-30 18:20 John L. Males
[not found] ` <200209302059.g8UKxQEh007769@darkstar.example.net>
2002-09-30 22:02 ` John L. Males
2002-10-01 2:02 ` Nick Piggin
2002-10-01 11:20 ` Christoph Hellwig
2002-10-02 7:55 Mikael Pettersson
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