RFR(S): 8138681: Runtime.getFreeMemory() reports wrong value after humongous allocation.

David Lindholm david.lindholm at oracle.com
Thu Nov 19 10:08:28 UTC 2015


Hi,

Please review this patch that changes how the usage of humongous regions 
are calculated. Since we (currently) cannot use the remainder of the 
last humongous region, we say that the complete region is used for the 
humongous object.

This is done by setting top=end and adding dummy/filler objects to the 
end of the last region.

Bug: https://bugs.openjdk.java.net/browse/JDK-8138681
Webrev: http://cr.openjdk.java.net/~david/JDK-8138681/webrev.00/

Testing: Passed JPRT, vm.gc testlist and the attached test from the bug.


Thanks,
David


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