linux-kernel - Re: [PATCH 0/6 v3] PCI: Linux kernel SR-IOV support

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Message-Id: <200809271308.03547.javier@guerrag.com>
Date:	Sat, 27 Sep 2008 13:07:57 -0500
From:	Javier Guerra Giraldez <javier@...rrag.com>
To:	"Zhao, Yu" <yu.zhao@...el.com>
Cc:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Grant Grundler <grundler@...isc-linux.org>,
	Alex Chiang <achiang@...com>, Matthew Wilcox <matthew@....cx>,
	Roland Dreier <rdreier@...co.com>, Greg KH <greg@...ah.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH 0/6 v3] PCI: Linux kernel SR-IOV support

On Saturday 27 September 2008, Zhao, Yu wrote:
> Greetings,
>
> Following patches are intended to support SR-IOV capability in the Linux
> kernel. With these patches, people can turn a PCI device with the
> capability into multiple ones from software perspective, which can benefit
> KVM and achieve other purposes such as QoS, security, etc.

sounds great, i think some Infiniband HBAs have this capability; they even 
suggested using on Xen for faster (no hypervisor intervention) communication 
between DomU's on the same box. (and transparently to out of the box, of 
course)

does it need an IOMMU (VT-d), or the whole magic is done by the PCI device?

-- 
Javier

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