Request for review (S): 8005489: VM hangs during GC with ParallelGC and ParallelGCThreads=0

[Erik Helin]

Hi Bengt,

looks good!

Erik

On 01/08/2013 11:16 AM, Bengt Rutisson wrote:
>
> Hi all,
>
> Could I have a couple of reviews for this change. The parallel collector
> needs at least one GC worker thread to function properly . Setting
> ParallelGCThreads=0 on the command line causes the parallel collector to
> hang in product builds and assert in debug builds. This has been the
> case back to JDK6u14.
>
> The fix will instead print an error message and exit the VM if
> ParallelGCThreads=0 is used with UseParallelGC. This is similar to what
> we recently did for the ParNew collector.
>
> http://cr.openjdk.java.net/~brutisso/8005489/webrev.00/
>
> Thanks,
> Bengt