From: Jens Axboe <axboe@suse.de>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: "Mudama, Eric" <eric_mudama@maxtor.com>,
Oleg Drokin <green@namesys.com>,
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Oliver Neukum <oliver@neukum.org>,
lkhelp@rekl.yi.org, linux-kernel@vger.kernel.org
Subject: Re: 2.5.69, IDE TCQ can't be enabled
Date: Mon, 12 May 2003 21:44:26 +0200 [thread overview]
Message-ID: <20030512194426.GH17033@suse.de> (raw)
In-Reply-To: <20030512194245.GG17033@suse.de>
On Mon, May 12 2003, Jens Axboe wrote:
> > Coming from an OS perspective, I think we really want to be able to
> > queue up a bunch of scatterlists, like the new AHCI spec does.
>
> I have to agree with Eric that the largest win is potentially not
> getting hit by the rotational latency all the time. I don't think you'll
> get much extra from actually having more than one active from the dma
> POV.
Actually, thinking a bit about it, if you could have more than one
active command then the release interrupt gets more interesting.
I've been brain damaged from working on the current stuff. It's one
thing what the spec tells you, it's another what really works in reality
:/
--
Jens Axboe
next prev parent reply other threads:[~2003-05-12 19:32 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-12 19:19 2.5.69, IDE TCQ can't be enabled Mudama, Eric
2003-05-12 19:35 ` Jeff Garzik
2003-05-12 19:42 ` Jens Axboe
2003-05-12 19:44 ` Jens Axboe [this message]
2003-05-12 19:53 ` Jeff Garzik
2003-05-13 6:40 ` Jens Axboe
2003-05-13 18:00 ` Dave Jones
2003-05-13 18:03 ` Jens Axboe
2003-05-13 18:05 ` Jeff Garzik
2003-05-13 18:06 ` Jens Axboe
2003-05-13 18:13 ` Jens Axboe
2003-05-13 18:42 ` Jeff Garzik
2003-05-13 20:29 ` Andre Hedrick
2003-05-14 7:04 ` Jens Axboe
2003-05-14 7:15 ` Jens Axboe
2003-05-13 20:03 ` Andre Hedrick
2003-05-13 22:55 ` Alan Cox
2003-05-13 18:03 ` Jeff Garzik
2003-05-14 13:30 ` Henning P. Schmiedehausen
2003-05-12 22:36 ` Christer Weinigel
2003-05-13 6:41 ` Jens Axboe
2003-05-13 20:04 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2003-05-13 20:43 Mudama, Eric
2003-05-13 20:31 Mudama, Eric
2003-05-13 20:34 ` Andre Hedrick
2003-05-13 20:28 Mudama, Eric
2003-05-12 17:58 Mudama, Eric
2003-05-12 18:59 ` Jens Axboe
2003-05-12 19:42 ` Jeff Garzik
2003-05-10 1:38 lkhelp
2003-05-12 12:46 ` Oleg Drokin
2003-05-12 12:55 ` Oliver Neukum
2003-05-12 13:16 ` Bartlomiej Zolnierkiewicz
2003-05-12 13:12 ` Alan Cox
2003-05-13 15:39 ` Jens Axboe
2003-05-12 13:22 ` Oleg Drokin
2003-05-12 13:23 ` Jens Axboe
2003-05-12 13:35 ` Jeff Garzik
2003-05-12 13:30 ` Bartlomiej Zolnierkiewicz
2003-05-12 13:22 ` Jens Axboe
2003-05-13 15:32 ` Jens Axboe
2003-05-13 17:25 ` Oliver Neukum
2003-05-13 17:28 ` Jens Axboe
2003-05-13 18:46 ` Oliver Neukum
2003-05-13 19:06 ` Jens Axboe
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