Re: [Xen-devel] panic("queue invalidate wait descriptor was not executed\n")

["Zytaruk, Kelly" <Kelly.Zytaruk@xxxxxxx>]

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Thursday, May 12, 2016 9:51 AM
> To: Zytaruk, Kelly
> Cc: Feng Wu; Kevin Tian; xen-devel@xxxxxxxxxxxxx
> Subject: RE: [Xen-devel] panic("queue invalidate wait descriptor was not
> executed\n")
> 
> >>> On 12.05.16 at 14:36, <Kelly.Zytaruk@xxxxxxx> wrote:
> >> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> >> Sent: Thursday, May 12, 2016 5:49 AM
> >> >>> On 11.05.16 at 15:51, <Kelly.Zytaruk@xxxxxxx> wrote:
> >> > During Xen boot I am seeing the panic in the subject line from
> >> > .../xen/drivers/passthrough/vgt/qinval.c
> >>
> >> And this is with current staging, or some much older version of Xen?
> >> (ISTR some issue with the invalidation request getting sent to the
> >> wrong IOMMU, leading to a timeout.)
> >
> > No this is not current Xen, it is with 4.2.
> >
> > Can you tell me more about the invalidation request getting sent to
> > the wrong IOMMU problem and approximately when it was fixed?  If you
> > could identify the patch I could back port it into my copy of Xen for 
> > testing.
> 
> Note that 4.2.5 has said change, and also note that you could have done 
> exactly
> what I have done now - go through the list of commits altering files in the 
> vtd/
> subtree. 

Unfortunately GIT is not my strong suit :( I am still learning to navigate with 
it. I guess part of my problem with GIT is that I don't yet know what I don't 
know.

>This is what I've been remembering:
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=84c340ba4c3eb9927
> 8b6ba885616bb183b88ad67

The comment on this link describes exactly what I am experiencing.
Thanks so much.

> 
> Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel