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Message-Id: <20070108170934.dafc5b81.pj@sgi.com>
Date:	Mon, 8 Jan 2007 17:09:34 -0800
From:	Paul Jackson <pj@....com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	tytso@....edu, suparna@...ibm.com, akpm@...l.org, w@....eu,
	torvalds@...l.org, hpa@...or.com, git@...r.kernel.org,
	nigel@...el.suspend2.net, warthog9@...nel.org,
	randy.dunlap@...cle.com, pavel@....cz,
	linux-kernel@...r.kernel.org, webmaster@...nel.org,
	linux-ext4@...r.kernel.org
Subject: Re: How git affects kernel.org performance

Jeff wrote:
> Something I just thought of:  ATA and SCSI hard disks do their own
> read-ahead.

Probably this is wishful thinking on my part, but I would have hoped
that most of the read-ahead they did was for stuff that happened to be
on the cylinder they were reading anyway.  So long as their read-ahead
doesn't cause much extra or delayed disk head motion, what does it
matter?

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
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