Re: pci passthrough issue introduced between 4.14.1 and 4.15.0

[AL13N <alien@xxxxxxxx>]

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?