Boot speedup with readahead

[Vasile Gaburici]

On Mon, Sep 8, 2008 at 1:26 AM, John Reiser <jreiser at bitwagon.com> wrote:
> 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.)

Interesting, so it's almost a hibernate in disguise. (I haven't
touched a Mac since 10.4)

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