[Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs jus

xen-devel

[Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just becaus

To:	Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject:	[Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just because there's no local APIC
From:	Yinghai Lu <yhlu.kernel@xxxxxxxxx>
Date:	Thu, 18 Jun 2009 22:32:59 -0700
Cc:	Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Len Brown <lenb@xxxxxxxxxx>
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doesn't XEN support per cpu irq vector?

got sth from XEN 3.3 / SLES 11

igb 0000:81:00.0: PCI INT A -> GSI 95 (level, low) -> IRQ 95
igb 0000:81:00.0: setting latency timer to 64
igb 0000:81:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:81:00.0: eth9: (PCIe:2.5Gb/s:Width x4) 00:21:28:3a:d8:0e
igb 0000:81:00.0: eth9: PBA No: ffffff-0ff
igb 0000:81:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s)
vendor=8086 device=3420
(XEN) irq.c:847: dom0: invalid pirq 94 or vector -28
igb 0000:81:00.1: PCI INT B -> GSI 94 (level, low) -> IRQ 94
igb 0000:81:00.1: setting latency timer to 64
(XEN) physdev.c:87: dom0: map irq with wrong vector -28
map irq failed
(XEN) physdev.c:87: dom0: map irq with wrong vector -28
map irq failed

the system need a lot of MSI-X normally.. with current mainline tree
kernel, it will need about 360 irq...

YH

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[Xen-devel] Re: [PATCH RFC] x86/acpi: don't ignore I/O APICs just becaus