Re: [Xen-devel] Are there source codes for Xen-IB?

[Pasi Kärkkäinen <pasik@xxxxxx>]

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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