linux-kernel - Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server

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Message-ID: <20090914070559.GB14030@redhat.com>
Date:	Mon, 14 Sep 2009 10:05:59 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	"Xin, Xiaohui" <xiaohui.xin@...el.com>
Cc:	"Ira W. Snyder" <iws@...o.caltech.edu>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"hpa@...or.com" <hpa@...or.com>,
	"gregory.haskins@...il.com" <gregory.haskins@...il.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"s.hetze@...ux-ag.com" <s.hetze@...ux-ag.com>,
	"avi@...hat.com" <avi@...hat.com>
Subject: Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server

On Mon, Sep 14, 2009 at 01:57:06PM +0800, Xin, Xiaohui wrote:
> >The irqfd/ioeventfd patches are part of Avi's kvm.git tree:
> >git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git
> >
> >I expect them to be merged by 2.6.32-rc1 - right, Avi?
> 
> Michael,
> 
> I think I have the kernel patch for kvm_irqfd and kvm_ioeventfd, but missed the qemu side patch for irqfd and ioeventfd.
> 
> I met the compile error when I compiled virtio-pci.c file in qemu-kvm like this:
> 
> /root/work/vmdq/vhost/qemu-kvm/hw/virtio-pci.c:384: error: `KVM_IRQFD` undeclared (first use in this function)
> /root/work/vmdq/vhost/qemu-kvm/hw/virtio-pci.c:400: error: `KVM_IOEVENTFD` undeclared (first use in this function)
> 
> Which qemu tree or patch do you use for kvm_irqfd and kvm_ioeventfd?

I'm using the headers from upstream kernel.
I'll send a patch for that.

> Thanks
> Xiaohui
> 
> -----Original Message-----
> From: Michael S. Tsirkin [mailto:mst@...hat.com] 
> Sent: Sunday, September 13, 2009 1:46 PM
> To: Xin, Xiaohui
> Cc: Ira W. Snyder; netdev@...r.kernel.org; virtualization@...ts.linux-foundation.org; kvm@...r.kernel.org; linux-kernel@...r.kernel.org; mingo@...e.hu; linux-mm@...ck.org; akpm@...ux-foundation.org; hpa@...or.com; gregory.haskins@...il.com; Rusty Russell; s.hetze@...ux-ag.com; avi@...hat.com
> Subject: Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server
> 
> On Fri, Sep 11, 2009 at 11:17:33PM +0800, Xin, Xiaohui wrote:
> > Michael,
> > We are very interested in your patch and want to have a try with it.
> > I have collected your 3 patches in kernel side and 4 patches in queue side.
> > The patches are listed here:
> > 
> > PATCHv5-1-3-mm-export-use_mm-unuse_mm-to-modules.patch
> > PATCHv5-2-3-mm-reduce-atomic-use-on-use_mm-fast-path.patch
> > PATCHv5-3-3-vhost_net-a-kernel-level-virtio-server.patch
> > 
> > PATCHv3-1-4-qemu-kvm-move-virtio-pci[1].o-to-near-pci.o.patch
> > PATCHv3-2-4-virtio-move-features-to-an-inline-function.patch
> > PATCHv3-3-4-qemu-kvm-vhost-net-implementation.patch
> > PATCHv3-4-4-qemu-kvm-add-compat-eventfd.patch
> > 
> > I applied the kernel patches on v2.6.31-rc4 and the qemu patches on latest kvm qemu.
> > But seems there are some patches are needed at least irqfd and ioeventfd patches on
> > current qemu. I cannot create a kvm guest with "-net nic,model=virtio,vhost=vethX".
> > 
> > May you kindly advice us the patch lists all exactly to make it work?
> > Thanks a lot. :-)
> > 
> > Thanks
> > Xiaohui
> 
> 
> The irqfd/ioeventfd patches are part of Avi's kvm.git tree:
> git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git
> 
> I expect them to be merged by 2.6.32-rc1 - right, Avi?
> 
> -- 
> MST
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