[Pkg-xen-devel] Bug#912975: xen-hypervisor-4.8-amd64: Dom0 crashes randomly without logs on Debian Stretch with Xen 4.8.4

[Roalt Zijlstra | webpower]

Hi Hans,

We did have some crashes , but now more every 1 or 2 months. We did have
the noreboot option, but so far this did not show anything. We were looking
into doing syslog reporting, but I am not sure if we fixed that on all Xen
servers. So maybe we should close the bug report since with the latest
kernel updates things are a bit better.

There is one thing to mention, which might help others on this matter. We
are now only running pretty stable with:

   - the Dom0 running with kernel: Debian 4.9.110-3+deb9u6
(2018-10-08) or Debian
   4.9.130-2 (2018-10-27)  with Xen 4.8.5-pre. And on all DomU servers with
   a 4.9 kernel.
   - the Dom0 running with kernel: Debian 4.9.65-3+deb9u1 (2017-12-23) with
   Xen 4.8.5-pre. This setup runs with mixed 3.16 and 4.9 kernels fine but
   without spectre/meltdown fixes.

Other combination like running DomUs with 3.16 kernels on the 4.9.110-3+deb9u6
(2018-10-08) Dom0 kernel is bound to crash quickly on heavily used servers.
Be it Nginx SSL offloading or an active MySQL database.
We have not tested the latest Debian Kernels with 3.16 kernels again.

Greetings,

Roalt


Op vr 22 feb. 2019 om 19:24 schreef Hans van Kranenburg <hans at knorrie.org>:

> tags 912975 + moreinfo
> thanks
>
> Hi,
>
> On 11/7/18 3:43 PM, Roalt Zijlstra | webpower wrote:
> >
> > Op wo 7 nov. 2018 om 14:30 schreef Hans van Kranenburg <hans at knorrie.org
> > <mailto:hans at knorrie.org>>:
> >     >
> >     > Well hopefully the 'noreboot' provided server crashes soon for some
> >     > logs. I will check if we can do any serial console tricks.
> >
> > Oh and before I forget.. Thanks for all the feedback/help!
>
> Do you have any update here? Any debug logging?
>
> The current state of this bug does not really allow anyone other than
> yourself to cause it to progress.
>
> Hans
>
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