Re: [win-pv-devel] Windows 10 domU is unstable with PV Bus Driver

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel [mailto:win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On
> Behalf Of Paul Durrant
> Sent: 05 January 2018 16:33
> To: 'Michel D'HOOGE' <michel.dhooge@xxxxxxxxx>
> Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: Re: [win-pv-devel] Windows 10 domU is unstable with PV Bus Driver
> 
> > -----Original Message-----
> > From: Michel D'HOOGE [mailto:michel.dhooge@xxxxxxxxx]
> > Sent: 05 January 2018 16:30
> > To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> > Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> > Subject: Re: [win-pv-devel] Windows 10 domU is unstable with PV Bus
> Driver
> >
> > Me again with a quick follow-up.
> >
> >
> > > Yesterday, I started with a 4.14.8 kernel
> >
> > I was quite sure I asked for the LTS kernel... and indeed, I
> > discovered that my systemd efi bootloader doesn't provide to xen the
> > options I defined :-(
> >
> > So today, I manually started XEN with a 4.9.74 kernel and I managed to
> > rdesktop-connect to my domU for several hours with no problems.
> >
> 
> Yes, the current implication is that issue started after 4.13.6... still no 
> clue
> what it is though :-(

The problem was multiple calls to the zerocopy callback in netback. The issue 
has been fixed in 4.14.11. See 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.14.13&id=17155ea827b2fd81330a442ed56d0edafd9969e1.

  Paul

> 
>   Paul
> 
> >
> > Michel
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