From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Nicol <davidnicol@gmail.com>
Subject: Re: [PATCH v3 0/5]add new ioctls to do metadata readahead in btrfs
Date: Wed, 19 Jan 2011 15:33:28 -0600
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References: <1295399715.1949.863.camel@sli10-conroe> <20110119123451.75bb3c76.akpm@linux-foundation.org>
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On Wed, Jan 19, 2011 at 2:34 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:

> It would be much more valuable if those 3.5 seconds were available to
> devices which really really care about bootup times, but very few of
> those devices use rotating disks nowadays, I expect?

And don't rotating disk modules read and buffer whole tracks, doing
their own readahead, anymore, anyway? Isn't that part of what "on-disk
cache" does?