Re: [Xen-users] PCI passthrough to NexentaStor?

[Ares Drake <ares.drake@xxxxxxxxxxxxxx>]

Am 19.10.2011 23:13, schrieb Chris Marget:
> I've headed down the path of building a virtual NexentaStor appliance
> with the intention of passing a SATA controller full of disks through
> to it...  But I'm beginning to have doubts about whether it's
> possible.
>
> NexentaStor is running in a Debian Squeeze Dom0 with Xen 4.0.  PCI
> pass-through is working with other DomU's, but I see no sign of my
> passed-through devices inside NexentaStor.
>
> xend.log seems to indicate that the pass-through is working, and the
> device is assigned according to 'xm pci-list<my-vm>'
>
> Sadly, 'lspci' within NexentaStor reports "Cannot find any working
> access method.", and 'prtconf -vp' reports nothing that looks like
> real hardware.
>
> Is this supposed to work?  I see lots of very old "coming soon"
> promises about xen-pcifront and xen-pciback support in OpenSolaris,
> but nothing to indicate that it ever became real.
I recentrly tried passthrough of an LSI 8x SAS controller to Solaris 
Express 151. While running baremetal the LSI controller is well 
supported in Solaris. Running Solaris as PV oder HVM DomU under OpenSuse 
11.4 with Xen 4.0.2 and kernel 2.6.37 the DomU would freeze right after 
boot (grub). I experienced the same with OpenSolaris 2009.06 and build 
141 and if I recall correctly with NexentaStor Community as well.
With FreeNAS / FreeBSD kernels as PV DomU it seams to work though. And 
as ZFS support was all I wanted, I stuck with FreeNAS.
Hope that helps.
Drake
> If it's not expected to work, why are people building PV NexentaStore
> appliances?  Is there another use case that doesn't involve
> pass-through of a disk controller?
>
> Thank you!
>
> /chris
>
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