From: "David S. Miller" <davem@redhat.com>
To: akpm@digeo.com
Cc: axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] deadline io scheduler
Date: Wed, 25 Sep 2002 23:27:41 -0700 (PDT) [thread overview]
Message-ID: <20020925.232741.02300012.davem@redhat.com> (raw)
In-Reply-To: <3D92A61E.40BFF2D0@digeo.com>
From: Andrew Morton <akpm@digeo.com>
Date: Wed, 25 Sep 2002 23:15:58 -0700
I'd like to gain a solid understanding of what these three knobs do.
Could you explain that a little more?
My basic understanding of fifo_batch is:
1) fifo_batch is how many contiguous requests can be in
a "set"
2) we send out one write "set" for every two read "sets"
3) a seek works out to "seek_cost" contiguous requests,
cost wise, this gets subtracted from how many requests
the current "set" has left that are allowed to be used
next prev parent reply other threads:[~2002-09-26 6:28 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 [this message]
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
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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