GMP aborting in __gmpn_cpuvec_init when run inside KVM

Marc Glisse marc.glisse at
Thu May 31 18:24:01 CEST 2012

On Thu, 31 May 2012, Richard Guenther wrote:

> On Thu, 31 May 2012, Marc Glisse wrote:
>> On Thu, 31 May 2012, Richard Guenther wrote:
>>> KVM unfortunately defaults to an impossible CPU model/family on x86_64
>>> ("GenuineIntel", family 6, model 2).  This leads to
>>> __gmpn_cpuvec_init abort()ing.  Of course KVM is to blame here but
>>> they appearantly don't want to fix ...
>> Do you have a link to the corresponding bug report / conversation?

"You are not authorized to access bug #671262."

But it looks like the same info is on:

> and its various duplicates report GCC crashes because of this
> when using in a virtualized 64bit environment.  The KVM folks not
> willing to fix things is is not direct information but from
> conversation in that bug.

And I couldn't see anything about the KVM folks refusing to fix something 
there or anywhere else google led me to. Maybe this choice of CPU has a 
desirable effect on windows or something, but I haven't managed to find 
the right page yet...

By the way, it seems that Marco already removed the aborts a few days ago.

Marc Glisse

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