[ewg] Re: [ofa-general] does RHEL5 Xen work with OFED?

[G.O.]

On 4/12/07, Michael S. Tsirkin <mst at dev.mellanox.co.il> wrote:
> > Quoting G.O. <gurhan.ozen at gmail.com>:
> > Subject: Re: [ofa-general] does RHEL5 Xen work with OFED?
> >
> > On 4/10/07, Michael S. Tsirkin <mst at dev.mellanox.co.il> wrote:
> > >> Quoting G.O. <gurhan.ozen at gmail.com>:
> > >> Subject: Re: [ofa-general] does RHEL5 Xen work with OFED?
> > >>
> > >> On 4/5/07, Scott Weitzenkamp (sweitzen) <sweitzen at cisco.com> wrote:
> > >> >Can I access OFED IPoIB and SRP/iSER devices from within a Xen virtual
> > >> >machine?
> > >> >
> > >>
> > >>    I haven't tested SRP/iSER , but IPoIB works only on dom0 kernel.
> > >> You can't use any  infiniband stuff on the guest OSes .
> > >>
> > >>   Gurhan
> > >
> > >What doesn't work? I would expect both IPoIB and SRP
> > >behave in more or less the same way as any network/storage
> > >devices, and get virtualized by Xen.
> > >
> >
> >    Nothing works. Guest kernel didn't even create
> > /sys/class/infiniband/* files.  'Far as the guest kernel is concerned,
> > HCA doesn't even seem to exist.
> >
> >   Just as a FYI, I have only tried on paravirtualized guests, didn't
> > try it with fully-virtualized guests.
>
> Why would you want to see /sys/class/infiniband/?
> There things are only there for direct HW access, guests do not get that.
>
> You should be able to use SRP and IPoIB - you set it up in host (dom0)
> and guests use it as any other network/storage device through the
> virtualization layer.
>

   Hi Michael,
  IIRC, i had got the "can't find device, initialization delayed"
errors. I'll play around with it again with the GA release when I get
a chance and will let you know. Might happen as early as next week.

   Thanks,
   Gurhan
>
> --
> MST
>