Re: [PATCH v3 0/5]add new ioctls to do metadata readahead in btrfs

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On Wed, Jan 19, 2011 at 2:34 PM, Andrew Morton
<akpm@xxxxxxxxxxxxxxxxxxxx> 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?
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