Andrew Reilly wrote:
>
> On Mon, Jun 19, 2000 at 05:01:46PM -0600, Warner Losh wrote:
> > In message <[EMAIL PROTECTED]> "Andrew Reilly" writes:
> > : That sounds way too hard. Why not restrict suspend activity to
> > : user-level processes and bring the kernel/drivers back up through
> > : a regular boot process? At least that way the hardware and drivers
> > : will know what they are all up to, even if some of it has changed
> > : in the mean time.
> >
> > Takes too long... That's shutdown, not S4.
>
> Yes. But what is the difference, really? As far as the
> hardware is concerned, it's being booted. If that process can
> be sped up by using the "S4" mechanisms, why can't they be
> applied to a regular boot process too? [I'm thinking about a
> kernel equivelant of the "clean shutdown" flag on file systems.]
If you resume a W2k system from hibernation it will basically boot
but with restoring from swap what was running before.
> Fundamentally, is there no way to get the kernel and drivers to
> go through a full boot phase in a small fraction of the time
> that it takes to repopulate 64M of RAM from disk? (*)
>
> I'm concerned about trying to take short-cuts with booting,
> because I've seen both the Toshiba laptop that I'm using now,
> and my mother's HP desktop system hang horribly hard when they
> should have been coming out of suspend. (Both W'98.)
>
> I like the idea that my laptop will save power by shutting down
> after a while, but I don't want to get into trouble if I forget
> whether I was docked or not, or whether the floppy was plugged
> in or not, when next I turn it on.
>
> (*) Speaking of which: why are we considering doing process
> dumps into a _different_ swap-ish partition, instead of just
> ensuring that all processes are sleeping in the normal swap
> partition? If that was done, then they would just page
> themselves back in as needed, on wake-up.
Yes, W2k pages everything out on hibernate and swaps it in back again
when you start using an application that was running before. It's pretty
evident once you've used W2k on a Laptop, you can really feel it.
> Sorry for blathering. This is just really interesting stuff.
It is! :)
--
Andre
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