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Re: [Qemu-devel] [Bug 1563887] Re: qemu-system-ppc64 freezes on starting

From: Michael Roth
Subject: Re: [Qemu-devel] [Bug 1563887] Re: qemu-system-ppc64 freezes on starting image on ppc64le
Date: Sat, 02 Apr 2016 09:33:19 -0500
User-agent: alot/0.3.6

Quoting Serge Hallyn (2016-04-01 11:56:29)
> Hi,
> I've redeployed my test box with 14.04 with kilo-staging archive, but i
> get a core dump when i try to run kvm the same way you did.

What does `ppc64_cpu --info` report? The original bug had some output
that suggested SMT was enabled:

>   cpu_cores: Number of cores present = 8
>   cpu_coreson: Number of cores online = 8
>   cpu_smt: SMT=8

But AFAIK, SMT should be disabled in the host (ppc64_cpu --smt off)
and left to individual guests to enable/disable in guest mode.

For KVM on powernv host kernel at least... original bug suggested
PowerVM mode:

> Bug description:
>   qemu-system-ppc64 running on Ubuntu 16.04 beta-2 fails to start an
>   image as part of the certification process. This on an IBM ppc64le in
>   PowerVM mode running Ubuntu 16.04 beta-2 deployed by MAAS 1.9.1. There
>   is no error output.

which I'm assuming didn't actually mean PowerVM instead of
powernv+KVM? Or was this actually a PowerVM partition trying to run
a KVM guest?

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