Re: [Xen-devel] [PATCH v2] x86/HVM: fix forwarding of internally cached requests

["Xu, Quan" <quan.xu@xxxxxxxxx>]

On May 19, 2016 5:15 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> >>> On 19.05.16 at 10:30, <quan.xu@xxxxxxxxx> wrote:
> > On April 28, 2016 11:13 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> >> >>> On 25.04.16 at 10:40, <liang.z.li@xxxxxxxxx> wrote:
> >> > With other patches also in place, still not work.
> >> > Jianzhong  has been left and Quan will take over the task.
> >>
> >> May I ask for another try, with current tip of staging plus
> >> http://lists.xenproject.org/archives/html/xen-devel/2016-
> >> 04/msg03661.html
> >> ?
> >
> > The same issue for rhel 6.4VM,  which cannot initialize VF driver
> > too.. the below is log  of rhel 6.4 VM:
> >              ..
> >              igbvf: 0000:00.04.0: Invalid MAC Address: 00:00:00:00:00:00
> >              igbvf: probe of 0000:00.04.0 failed with error -5
> >              ..
> >
> > But when I tried to initialize VF MAC in Dom0 with e.g.:
> >                   $ip link set eth0 vf 0 mac 00:1E:67:65:93:01
> 
> Makes things even more strange, as things work fine for me with
> SLE11 and SLE12 guests. But I have to admit that the "Invalid MAC Address"
> looks quite unrelated, i.e. is this perhaps some completely different problem
> you have?

I tried to run SLE12 guest. Things are really working fine for me too..
But not for rhel 6.4 guest..

So far, I think the bug is not from xen hypervisor, just from vf driver.

Look at this bug, even from KVM --- igb VF can't work in KVM guest, 
https://bugzilla.kernel.org/show_bug.cgi?id=55421
 
> 
> Again, considering that you have a repro (while I don't), the easiest would be
> to simply log all MSI-X related actions (there shouldn't be too many), to see
> where things go wrong. Such a log alone would maybe already allow me to do
> further investigation.
> 

I need more time to read this part, but sure I will follow it.

Quan
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