Re: [Xen-users] GPU passthrough on Xen 4.4.0, FLReset-

[Gordan Bobic <gordan@xxxxxxxxxx>]

On 2014-06-06 12:36, Kuba wrote:
> W dniu 2014-06-06 12:15, Gordan Bobic pisze:
> > On 2014-06-06 10:53, Kuba wrote:
> > > Dear Gordan and David
> > >
> > > Thank you both for lots of valuable info and clues. It seems some of
> > > my issues might be hardware/BIOS related, so I'm going to look into 
> > > it
> > > (among other things).
> > >
> > > Gordan, I can see you use a ZVOL as your VM's storage, have you ever
> > > tried to run dom0 with root on ZFS?
> > No, I always have dom0 rootfs on a stable in-kernel FS that is
> > reasonably unlikely to blow up in my face when I upgrade the
> > kernel. IMO, rootfs is sufficiently small and easy to back up
> > and restore that there is no obvious advantage to having it
> > on ZFS.
> >
> > There is too much forward/backward incompatibility
> > to allow for old modules to work with new kernels, which
> > makes kernel upgrades problematic, and to gain full advantage
> > of ZFS you need to put /boot on ZFS as well, which means
> > custom patched grub, and it all adds up to far too much
> > effort for negligible benefit.
> >
> > I do use ZFS for everything else, though.
> I certainly do agree with all that. Having entire dom0 on ZFS is just
> a little wish of mine for one main reason - data corruption detection
> and self-healing.
That is all well and good, and I hope it gets there at some point,
but in reality the rootfs is a relatively small 99% write-once
medium, so keeping it backed up and checked is not as daunting
as it is for other data storage.

Gordan

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