linux-kernel - Re: [PATCH 0/16 v6] PCI: Linux kernel SR-IOV support

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Message-ID: <49137255.9010104@codemonkey.ws>
Date:	Thu, 06 Nov 2008 16:40:21 -0600
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Greg KH <greg@...ah.com>
CC:	Matthew Wilcox <matthew@....cx>, H L <swdevyid@...oo.com>,
	Yu Zhao <yu.zhao@...el.com>, randy.dunlap@...cle.com,
	grundler@...isc-linux.org, achiang@...com,
	linux-pci@...r.kernel.org, rdreier@...co.com,
	linux-kernel@...r.kernel.org, jbarnes@...tuousgeek.org,
	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	mingo@...e.hu, Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH 0/16 v6] PCI: Linux kernel SR-IOV support

Greg KH wrote:
> On Thu, Nov 06, 2008 at 10:47:41AM -0700, Matthew Wilcox wrote:
>   
>> I don't think we really know what the One True Usage model is for VF
>> devices.  Chris Wright has some ideas, I have some ideas and Yu Zhao has
>> some ideas.  I bet there's other people who have other ideas too.
>>     
>
> I'd love to hear those ideas.
>   

We've been talking about avoiding hardware passthrough entirely and just 
backing a virtio-net backend driver by a dedicated VF in the host.  That 
avoids a huge amount of guest-facing complexity, let's migration Just 
Work, and should give the same level of performance.

Regards,

Anthony Liguori

> Rumor has it, there is some Xen code floating around to support this
> already, is that true?
>
> thanks,
>
> greg k-h
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