JDK-6779436 : NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: hs14
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2008-12-03
  • Updated: 2010-04-03
  • Resolved: 2008-12-10
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JDK 6 JDK 7 Other
6u14Fixed 7Fixed hs14Fixed
Because of the bad coding in the later revisions of the 1st version of 
libnuma os::Linux::rebuild_cpu_to_node_map() had a problem interacting with 
the library. CPU bitmap size has to be of a certain size.

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/85f1b9537f70

EVALUATION The bug can cause an incorrect construction of the cpu to node map, which renders NUMA optimizations unusable.