From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Christoph Hellwig <hch@lst.de>
Subject: Re: [Qemu-devel] virtio-blk issues
Date: Tue, 3 Mar 2009 14:22:43 +0000 [thread overview]
Message-ID: <200903031422.44151.paul@codesourcery.com> (raw)
In-Reply-To: <20090303125411.GA16099@lst.de>
On Tuesday 03 March 2009, Christoph Hellwig wrote:
> I've been trying to move setup from kvm 72 in debian testing to the current
> qemu CVS. The setup is using 7 virtio_blk disks and used to work on the
> old setup, but with current qemu the kernel (current Linus' HEAD from a few
> days ago) hangs when trying to setup the irq routing for the virtio_pci
> devices:
>
> virtio pci 0000:00:06.0: can't derive routing for PCI INT A
> virtio pci 0000:00:06.0: PCI INT A: no GSI - using IRQ 9
IIRC this is partly a bios issue. Real PIIX3 based systems never have more
than ~5 PCI slots, so it doesn't have interrupt routing for more devices.
There are two solutions: Fix the bios to handle machines with large numbers of
PCI slots, or have create multifunction PCI devices so lots of virtio
instances don't use so many virtual PCI slots.
Paul
next prev parent reply other threads:[~2009-03-03 14:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-03 12:54 [Qemu-devel] virtio-blk issues Christoph Hellwig
2009-03-03 14:22 ` Paul Brook [this message]
2009-03-03 15:23 ` Christoph Hellwig
2009-03-03 17:22 ` Anthony Liguori
2009-03-16 13:22 ` Avi Kivity
2009-03-18 8:08 ` Christoph Hellwig
2009-03-18 8:41 ` Avi Kivity
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