From mboxrd@z Thu Jan  1 00:00:00 1970
From: Philippe Gerum <rpm@xenomai.org>
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Date: Tue, 08 May 2007 15:37:40 +0200
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Sender: Philippe Gerum <philippe.gerum@domain.hid>
Subject: Re: [Xenomai-help] Xenomai and MSI enabled crashes kernel
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To: "M. Koehrer" <mathias_koehrer@domain.hid>
Cc: xenomai@xenomai.org, jan.kiszka@domain.hid

On Tue, 2007-05-08 at 14:38 +0200, M. Koehrer wrote:
> Hi Philippe,
> 
> perhaps one more information regarding that issue: 
> When I disable SMP, it seems to work fine (APIC and local APIC are enabled).

This should improve things:

--- a/arch/i386/kernel/ipipe.c
+++ b/arch/i386/kernel/ipipe.c
@@ -373,7 +373,7 @@ int fastcall __ipipe_send_ipi (unsigned ipi, cpumask_t cpumask)
        cpu_clear(cpuid,cpumask);

        if (!cpus_empty(cpumask))
-               send_IPI_mask(cpumask,ipi + FIRST_EXTERNAL_VECTOR);
+               send_IPI_mask(cpumask,ipipe_apic_irq_vector(ipi));

        if (self)
                ipipe_trigger_irq(ipi);

-- 
Philippe.