Re: [Xen-devel] Xen default install - no cpufreq on dom0 ?

["Luis R. Rodriguez" <mcgrof@xxxxxxxx>]

On Tue, Feb 23, 2016 at 10:44:56PM +0000, Andrew Cooper wrote:
> On 23/02/2016 22:18, Luis R. Rodriguez wrote:
> > On Tue, Feb 23, 2016 at 05:00:12PM -0500, Konrad Rzeszutek Wilk wrote:
> >> On Tue, Feb 23, 2016 at 12:48:18PM -0800, Luis R. Rodriguez wrote:
> >>> For a while now I've been installing Xen from source on my Debian box,
> >>> with a default configuration always. This is party why I've run into
> >>> compile issues before it seems, but I've also just picked up on
> >>> another possible issue. My system on dom0 overheats and shuts itself
> >>> off. For a while I didn't think this was Xen related and perhaps
> >>> related to the fact that I built this system myself. However, after
> >>> running Debian without Xen (rm -rf /boot/xen*; update-grub; reboot;
> >>> systemd-detect-virt yield none) it would seem this does not happen.
> >>> What's a bit concerning though is even if I run offlineimap in
> >>> singlethreaded mode (offlineimap -1) the machine overheats and shuts
> >>> itself off, so I don't necessarily need to be doing a lot of work. I
> >>> tried compiling the kernel without Xen while running offlineimap as
> >>> well with make -j 8 and it doesn't overheat, meanwhile on Xen dom0
> >>> just using offlineimap -1 seems to trigger a shutoff rather quickly.
> >> What exactly triggers the shutoff.
> > Clearly, overheating. I'm not yet sure if its just BIOS/kernel/hypervisor
> > induced forced shutdown. Will try again, but this is rather intrusive as
> > its on my personal home system.
> 
> You have dislodged the heat sync and the processor is shutting down due
> to thermal cutout.

How do I prevent this ? The difference in operation between dom0 and
bare metal is rather extreme. Is this expected ? Is there a clutch
I can use ?

  Luis

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