Review request: 8004697: SIGSEGV on Solaris sparc with -XX:+UseNUMA

Jesper Wilhelmsson jesper.wilhelmsson at oracle.com
Mon Mar 11 04:33:42 PDT 2013


The change looks good.
I especially like the assert :-)

Ship it!
/Jesper

On 11/3/13 11:04 AM, Stefan Karlsson wrote:
> http://cr.openjdk.java.net/~stefank/8004697/webrev.00/
>
> The JVM crashes because it accidentally frees memory in the survivor regions, at
> one point where it is supposed to only free freeing memory in the eden.
>
> The code in os::scan_pages(start, end, ...) in solaris_os.cpp looks at pages
> starting beyond 'end'. This causes MutableNUMASpace::LGRPSpace::scan_pages to
> free memory outside eden, when the last page starts in, but ends outside of eden.
>
> Testing: The JVM used to crash within in a couple of minutes. With the patch,
> the test has been running over the weekend without any crashes.
>
> thanks,
> StefanK


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