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

[Michael S. Tsirkin]

> 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.


-- 
MST