From: Patrick Mansfield <patmans@us.ibm.com>
To: Jens Axboe <axboe@suse.de>
Cc: Andrew Morton <akpm@digeo.com>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] deadline io scheduler
Date: Thu, 26 Sep 2002 08:54:45 -0700 [thread overview]
Message-ID: <20020926085445.A22321@eng2.beaverton.ibm.com> (raw)
In-Reply-To: <20020926065951.GD12862@suse.de>; from axboe@suse.de on Thu, Sep 26, 2002 at 08:59:51AM +0200
On Thu, Sep 26, 2002 at 08:59:51AM +0200, Jens Axboe wrote:
> On Thu, Sep 26 2002, Jens Axboe wrote:
> BTW, for SCSI, it would be nice to first convert more drivers to use the
> block level queued tagging. That would provide us with a much better
> means to control starvation properly on SCSI as well.
>
> --
> Jens Axboe
I haven't look closely at the block tagging, but for the FCP protocol,
there are no tags, just the type of queueing to use (task attributes)
- like ordered, head of queue, untagged, and some others. The tagging
is normally done on the adapter itself (FCP2 protocol AFAIK). Does this
mean block level queued tagging can't help FCP?
Maybe the same for iSCSI, other protocols, and pseudo adapters -
usb, ide, and raid adapters.
-- Patrick Mansfield
next prev parent reply other threads:[~2002-09-26 15:49 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-25 17:20 Jens Axboe
2002-09-26 6:15 ` Andrew Morton
2002-09-26 6:27 ` David S. Miller
2002-09-26 6:44 ` Jens Axboe
2002-09-26 6:59 ` Jens Axboe
2002-09-26 7:06 ` William Lee Irwin III
2002-09-26 7:06 ` David S. Miller
2002-09-26 7:16 ` Jeff Garzik
2002-09-26 7:13 ` David S. Miller
2002-09-26 7:33 ` Jeff Garzik
2002-09-26 7:35 ` David S. Miller
2002-09-26 8:15 ` Michael Clark
2002-09-26 8:18 ` William Lee Irwin III
2002-09-26 17:41 ` Mike Anderson
2002-09-26 18:03 ` Jeff Garzik
2002-09-26 19:21 ` Mike Anderson
2002-09-27 5:41 ` Andrew Vasquez
2002-09-27 5:57 ` Jeff Garzik
2002-09-27 16:58 ` Mike Anderson
2002-09-26 22:41 ` Matt Porter
2002-09-26 22:35 ` Mark Bellon
2002-09-26 20:21 ` Thomas Tonino
2002-09-26 7:41 ` Jeff Garzik
2002-09-26 7:23 ` William Lee Irwin III
2002-09-26 7:11 ` Jeff Garzik
2002-09-26 7:14 ` William Lee Irwin III
2002-09-26 15:54 ` Patrick Mansfield [this message]
2002-09-30 8:15 ` Jens Axboe
2002-09-30 15:39 ` Patrick Mansfield
2002-09-30 16:08 ` Jens Axboe
2002-09-26 8:28 ` Daniel Pittman
2002-09-26 8:29 ` Jens Axboe
2002-09-26 23:23 ` Daniel Pittman
2002-09-30 8:10 ` Jens Axboe
2002-09-26 15:09 ` Rik van Riel
2002-09-26 7:12 ` Andrew Morton
2002-09-26 7:17 ` Jens Axboe
2002-09-26 7:34 ` Jens Axboe
2002-09-30 7:45 ` Pavel Machek
2002-10-02 5:35 ` Jens Axboe
2002-09-27 16:01 Andrew Vasquez
2002-09-27 17:07 ` Mike Anderson
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