On Tue, 2007-06-05 at 17:07 +0100, Alan Cox wrote:
> On Wed, 06 Jun 2007 00:58:03 +1000
> Rusty Russell <[email protected]> wrote:
>
> > The IDE probe is the slowest part of boot: by suppressing it we cut
> > boot from from 3 seconds to half a second.
>
> NAK NAK NAK NAK NAK
Hi Alan!
> > AFAICT, the commandline is the easiest way to suppress the probing.
>
> Gaa ... Rusty surely you have more taste than that.
Indeed, but it got attention 8)
> See include/asm-foo/ide.h
>
> Add an lguest check to go with the pci check and for the lguest case just
> say "no controllers"
Actually, Jeremy suggested claiming the entire IO space. That works for
Xen domU too, and makes some amount of sense.
> Better yet just don't compile in the old IDE stuff, lguest doesn't have a
> PCI or ISA bus anyway.
Sure, but the "run the same kernel as guest and host" is a really nice
feature.
> Alternatively make the IDE I/O space return 0xFF and it'll skip them
> anyway.
Hmm, every "in" should be returning 0xFFs, but I still get the delay and
the probing. Xen domU gets it too.
Thanks!
Rusty.
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