linux-kernel - Re: PCI MSI breaks when booting with nosmp

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Message-ID: <20080421194336.GC32278@elf.ucw.cz>
Date:	Mon, 21 Apr 2008 21:43:36 +0200
From:	Pavel Machek <pavel@....cz>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-pci@...ey.karlin.mff.cuni.cz,
	Jean Delvare <jdelvare@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Tejun Heo <htejun@...il.com>,
	Tom Long Nguyen <tom.l.nguyen@...el.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Jeff Garzik <jgarzik@...ox.com>
Subject: Re: PCI MSI breaks when booting with nosmp

On Mon 2008-04-21 20:45:05, Andi Kleen wrote:
> Jesse Barnes <jbarnes@...tuousgeek.org> writes:
> >
> > Ok, I see this too on my desktop machine.  It looks like we're not getting 
> > interrupts setup correctly in the nosmp case.  Still digging through to see 
> > why though...
> 
> NoSMP disables the io-apic and a lot of modern systems don't work
> without APIC.

Are you sure? I still boot DOS on very recent boxes, and they seem to
work. How can PC-compatible machine require an APIC?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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