Segmentation fault with NUMA aware ParallelScavange GC

Lokesh Gidra lokesh.gidra at
Thu Jul 28 22:36:16 UTC 2011

Hi Igor,

Yes, its a Linux box with 2.6.35-22-server kernel version. Its running a 64-bit ubuntu server.

Yes it does reproduce with -XX:-UseLargePages option.

Please let me know if you need any other information.


>From: Igor Veresov <igor.veresov at>
>To: hotspot-gc-dev at
>Sent: Thursday, 28 July 2011 11:14 PM
>Subject: Re: Segmentation fault with NUMA aware ParallelScavange GC
>This is Linux, right?
>What kernel version do you have?
>Does it reproduce with -XX:-UseLargePages?
>On 7/28/11 2:23 AM, Lokesh Gidra wrote:
>> Hi,
>> I am trying to use the NUMA-aware implementation of ParallelScavenge GC
>> of OpenJDK7 on a 8-node machine. Almost everytime I run it, I get a
>> segmentation fault trying to access a page aligned address. The test is
>> with DaCapo benchmarks which works fine with default setup. Although the
>> address lies in the range of one of the lgrp's but in the memory maps,
>> its not mapped anywhere. Can anyone please explain me what could be the
>> problem. Please let me know if some additional information is needed.
>> Best Regards,
>> Lokesh
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