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Re: PCI MSI breaks when booting with nosmp

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From: Andi Kleen
Subject: Re: PCI MSI breaks when booting with nosmp
Date: Monday, April 21, 2008 - 2:09 pm

> Both call disable_ioapic_setup(), so how can they not be the same?

See Jesse's explanation. Basically there is special code in the smp 
boot up to handle 0 CPUs and it disables all APICs.

This is very old and crufty and somewhat obsolete logic,
but it is like that.

-Andi
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Messages in current thread:
PCI MSI breaks when booting with nosmp, Jean Delvare, (Thu Apr 17, 12:40 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Thu Apr 17, 1:08 pm)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Thu Apr 17, 1:25 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Mon Apr 21, 10:43 am)
Re: PCI MSI breaks when booting with nosmp, Andi Kleen, (Mon Apr 21, 11:45 am)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Mon Apr 21, 12:06 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Mon Apr 21, 12:35 pm)
Re: PCI MSI breaks when booting with nosmp, Andi Kleen, (Mon Apr 21, 12:41 pm)
Re: PCI MSI breaks when booting with nosmp, Pavel Machek, (Mon Apr 21, 12:43 pm)
Re: PCI MSI breaks when booting with nosmp, Andi Kleen, (Mon Apr 21, 12:44 pm)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Mon Apr 21, 1:20 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Mon Apr 21, 1:40 pm)
Re: PCI MSI breaks when booting with nosmp, Andi Kleen, (Mon Apr 21, 1:46 pm)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Mon Apr 21, 1:48 pm)
Re: PCI MSI breaks when booting with nosmp, Andi Kleen, (Mon Apr 21, 2:09 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Mon Apr 21, 2:14 pm)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Tue Apr 22, 6:27 am)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Tue Apr 22, 8:50 am)
Re: PCI MSI breaks when booting with nosmp, Pavel Machek, (Tue Apr 22, 2:25 pm)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Tue Apr 22, 4:07 pm)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Wed Apr 23, 7:38 am)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Wed Apr 23, 8:12 am)
Re: PCI MSI breaks when booting with nosmp, Maciej W. Rozycki, (Wed Apr 23, 11:13 am)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Wed Apr 23, 11:23 am)
Re: PCI MSI breaks when booting with nosmp, Jesse Barnes, (Wed Apr 23, 11:32 am)
Re: PCI MSI breaks when booting with nosmp, Jean Delvare, (Wed Apr 23, 11:32 am)
Re: PCI MSI breaks when booting with nosmp, Maciej W. Rozycki, (Wed Apr 23, 11:38 am)