Boot speedup with readahead

[John Reiser]

drago01 wrote:
> On Sun, Sep 7, 2008 at 6:21 AM, Arjan van de Ven <arjan at infradead.org> wrote:
   [snip]
>> for those who are going to the plumbers conference... Auke Kok and I
>> will present there on how to make a Fedora based system boot in 5
>> seconds...
>>
>> and yes a form of readahead was needed to achieve that ;-)
> 
> wtf?
> without a custom kernel I doubt that this is possible....

Shut down and boot an Apple Macintosh running current OS X 10.5.4.
As part of shutting down, it builds a RAM disk of what will be needed
at next boot, then saves the RAM disk to hard disk.  (I have not seen
the work by Arjan+Auke, but I boot many kinds of systems.)

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