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

[G.O.]

Hi Michael,
I am getting "Device ib0 does not seem to be present, delaying
initialization." warning.
I tried creating a new network-bridge by using ib0 interface  on Dom-0
as the net device as well but didn't work.

Thanks,
gurhan


On 4/12/07, G. O. <gurhan.ozen at gmail.com> wrote:
> 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
> >
>