On Thu, 2011-05-26 at 15:04 +0100, maus wrote:
> 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?
> 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.
> 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
> > 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
> address in dom0 for migration etc etc.
> > 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
> > 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
> > special
> > outside of what is available in the upstream dom0
> > 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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