On Thu, May 26, 2011 at 03:10:40PM +0100, Ian Campbell wrote:
> On Thu, 2011-05-26 at 15:04 +0100, maus wrote:
> > Hi,
> >
> > I know use IP-over-IB can let KVM or Xen use IB, but what I have to do
> > is like Xen-IB. Not just use IB.
>
> What is Xen-IB exactly?
>
Could "Xen-IB" mean live migration over Infiniband RDMA (Remote DMA) ?
I can't really think of other uses..
-- Pasi
> > So, there is no toturial for Xen-IB,right?
>
> That's right, there is no documentation and anyone who would have been
> involved with this stuff is long gone.
>
> Ian.
>
> >
> >
> > Yi-Man
> >
> >
> >
> > 2011/5/26 Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
> > On Wed, 2011-05-25 at 14:40 +0100, maus wrote:
> > > Hi,
> > >
> > > I have a project which is make KVM use InfiniBand.
> > > However, since Xen can use InfiniBand through Xen-IB, I want
> > to try to
> > > make Xen use InfiniBand first.
> > > Through that way, I think it may give me some idea about how
> > to make
> > > KVM use InfiniBand.
> > > So, as you said, I just use "Updated defconfig to include
> > infiniband
> > > driver as modules for dom0/domU" to do?
> > > And since I don't know how to I do first for Xen-IB, is
> > there any
> > > tutorial for Xen-IB?
> > > Or does Xen build-in support IB currently?
> >
> >
> > I'm not sure what IB support you expect Xen to have over and
> > above the
> > driver and utils support, which are functions of the dom0
> > kernel and
> > distro and not the hypervisor.
> >
> > Have you got IB working on a native system? I expect that if
> > you do that
> > then Xen or KVM will be able to make use of it basically for
> > free, i.e.
> > configure a VIF on an IP-over-IB bridge or use a local
> > IP-over-IB
> > address in dom0 for migration etc etc.
> >
> > Ian.
> >
> >
> > >
> > > Yi-Man
> > >
> > >
> > >
> > > 2011/5/24 Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
> > > Please do not top post.
> > >
> > > On Tue, 2011-05-24 at 11:07 +0100, maus wrote:
> > > > Hi,
> > > >
> > > > There many file in
> > > http://xenbits.xensource.com/ext/xen-smartio/ ,
> > > > which should I use for Xen-IB?
> > > > Use the following three?
> > > > Updated defconfig to include infiniband driver as
> > modules
> > > for
> > > > dom0/domU
> > > > Updating drivers/infiniband to latest. Should
> > shrink size of
> > > > xen_ib.patch in
> > > > Add support for Infiniband into Xen
> > >
> > >
> > > Again, these changesets are >5 years old and have
> > not been
> > > looked at or
> > > maintained since -- I am very sceptical that you
> > will find
> > > anything of
> > > use on a modern Xen system in there.
> > >
> > > I expect that IB support in the kernels we currently
> > use for
> > > dom0 is
> > > vastly improved over what was available in the
> > 2.6.16 tree
> > > referenced in
> > > the above repository. Perhaps you don't even need
> > anything
> > > special
> > > outside of what is available in the upstream dom0
> > kernel.
> > >
> > > Perhaps if you explain what you are actually trying
> > to achieve
> > > then
> > > people will be able to better advise you?
> > >
> > > Ian.
> > >
> > >
> > >
> >
> >
> >
> >
>
>
>
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