From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 50891] The smp_affinity cannot work correctly on guest os when
 PCI passthrough device using msi/msi-x with KVM
Date: Thu, 29 Nov 2012 16:33:39 +0000 (UTC)
Message-ID: <20121129163339.1B31C11FB3B@bugzilla.kernel.org>
References: <bug-50891-28872@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=50891





--- Comment #7 from Alex Williamson <alex.williamson@redhat.com>  2012-11-29 16:33:38 ---
(In reply to comment #6)
> 1:i have set the irq (associate the passthrough device) to the vcpu2 on the
> guest os.but look at /proc/interrupts on the guest and the interrupt count 
> with the pinned IRQ increases a lot of vcpus except the vcpu0.

Perhaps double check that irqbalance is not running the in guest, ps aux | grep
irqbalance.

> 2 my qemu kvm version is 1.2 , and have not add the patch
> http://www.spinics.net/lists/kvm/msg83109.html from, maybe it will help me.
> are you sure that your qemu-kvm is from the
> git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git?

Those patches are against git://git.qemu.org/qemu.git  I believe the BCM5716
will try to use MSI-X interrupts, not MSI.  Please provide lspci -vvv of the
device in the guest and we can verify what interrupt mode it's working in. 
What is the guest operating system?  Thanks.

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