[elbe-devel] elbe-testing v1.9.23

[Lukasz Walewski]

Hi Manuel,

>-----Ursprüngliche Nachricht-----
>Von: Manuel Traut [mailto:manuel.traut at linutronix.de]
>Gesendet: Freitag, 7. Juli 2017 00:05
>An: Lukasz Walewski
>Cc: elbe-devel at linutronix.de
>Betreff: Re: [elbe-devel] elbe-testing v1.9.23
>
>It sounds like an issue specific for the nested vmware setup.

That is a bad news for us, since we run all our build servers in VMware :(

>Is there a way to detect, that we run on a netsted vmware setup? Than we
>could at least give a hint, that there is a known bug and describe the
>workaround.

Hm.. I am not aware of any reliable technique so far. An internet search returned some interesting hits, e.g. [1,2] (didn't try them out though) but I do not know how portable/reliable would you like to be here. Brute-force approaches rely on greping the dmesg for different things, e.g.:

$ dmesg | grep -i hypervisor
[    0.000000] Hypervisor detected: VMware
[    0.000000] Host bus clock speed read from hypervisor : 66000000 Hz
[    0.000000] TSC freq read from hypervisor : 3398.079 MHz
[    5.611024] [drm] Max dedicated hypervisor surface memory is 0 kiB

But it doesn't give predictable results, as the output varies with Debian versions. I don't know, if this technique could be used to differentiate among different virtualization techniques.

Am I going in the right direction?

Best regards,
Lukasz


[1] http://www.ouah.org/Red_%20Pill.html
[2] http://www.trapkit.de/tools/scoopyng/index.html



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