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

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Date:	Mon, 14 Sep 2009 13:57:06 +0800
From:	"Xin, Xiaohui" <xiaohui.xin@...el.com>
To:	"Michael S. Tsirkin" <mst@...hat.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

>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?

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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