Request for reviews (S): 6968646: JVM crashes with SIGFPE during startup

[Tom Rodriguez]

Looks good.

tom

On Jul 13, 2010, at 3:22 PM, Vladimir Kozlov wrote:

> http://cr.openjdk.java.net/~kvn/6968646/webrev
> 
> Fixed 6968646: JVM crashes with SIGFPE during startup
> 
> Introduced by changes for 6964774 which added cpuid
> processor topology code. Some cpus have max cpuid >= 11
> but do not support processor topology:
> 
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 23
> model name	: Intel(R) Xeon(R) CPU           E5472  @ 3.00GHz
> stepping	: 10
> cpu MHz		: 2403.000
> cpu cores	: 4
> cpuid level	: 13
> 
> 
> Solution:
> Check that cpuid returns valid values for processor
> topology (not zeros) and use old code if they are invalid.
> 
> Test on failed machine.