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

Jon Masamitsu jon.masamitsu at oracle.com
Mon Mar 11 11:10:36 PDT 2013


Looks good.

Jon

On 03/11/13 03:04, 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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