Re: pci passthrough issue introduced between 4.14.1 and 4.15.0

[AL13N <alien@xxxxxxxx>]

AL13N schreef op 2021-06-01 16:06:
> Jan Beulich schreef op 2021-06-01 12:08:
> > On 01.06.2021 09:36, AL13N wrote:
> > > Not 100% it's a bug or something i did wrong, but,
> > >
> > > with xl create i start a PV with 3 pci passthroughs
> > >
> > > after wards, xl pci-list shows all 3 nicely
> > >
> > > looking at the domU boot logs, pcifront is only creating one pci 
> > > device
> > > and lspci in the guest shows only 1 pci entry
> > >
> > > in at least 4.14.1 it still works.
> > This reminds me of my report at
> > https://lists.xen.org/archives/html/xen-devel/2021-03/msg00956.html
> >
> > Meanwhile the proposed pciback change has gone in upstream:
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/xen/xen-pciback?id=c81d3d24602540f65256f98831d0a25599ea6b87
> >
> > I wasn't, however, aware that this may have been an issue going
> > from 4.14.1 to 4.15.0, i.e. something that was presumably (as
> > George also has just said) a regression in the tools. Or else I
> > probably wouldn't have suggested taking care of this in Linux.
> > Nevertheless you may want to give that change a try.
> Well, both tests have only different tools en hypervisor, no kernel
> was changed between both tests, neither in dom0 or domU , so, it might
> not be pciback?
forgot to mention, dom0 is 5.7.19 and domU is 5.10.27 for all tests