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Date: Wed, 06 Jun 2007 11:10:58 +1000 From: Rusty Russell <rusty@...tcorp.com.au> To: Alan Cox <alan@...rguk.ukuu.org.uk> Cc: Andrew Morton <akpm@...ux-foundation.org>, lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>, bzolnier@...il.com, Matt Mackall <mpm@...enic.com>, Jeremy Fitzhardinge <jeremy@...p.org> Subject: Re: [PATCH 3/6] lguest suppress IDE probing On Tue, 2007-06-05 at 17:07 +0100, Alan Cox wrote: > On Wed, 06 Jun 2007 00:58:03 +1000 > Rusty Russell <rusty@...tcorp.com.au> 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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