Pkg xen devel - Feb 2018 - Bug#880554: Bug#880554: Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64

On Tue, Feb 27, 2018 at 08:22:50PM +0100, Valentin Vidic
wrote:
> Since I can't reproduce it easily anymore I suspect something was
> fixed in the meanwhile.  My original report was for 4.9.30-2+deb9u2
> and since then there seems to be a number of fixes that could be
> related to this:
Just rebooted both dom0 and domU with 4.9.30-2+deb9u2 and the the
postgresql domU is having problems right away after boot:

  domid=1: nr_frames=32, max_nr_frames=32

  [  242.652100] INFO: task kworker/u90:0:6 blocked for more than 120 seconds.

Upgrading the kernels and I can't get it above 11 anymore:

  domid=1: nr_frames=11, max_nr_frames=32

So some of those many kernel fixes did the trick and things just
work fine with the newer kernels without raising gnttab_max_frames.

-- 
Valentin