JDK-6850720 : (process) Use clone(CLONE_VM), not fork, on Linux to avoid swap exhaustion
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.lang
  • Affected Version: 6
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: linux
  • CPU: unknown
  • Submitted: 2009-06-12
  • Updated: 2010-04-03
  • Resolved: 2009-06-22
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7 b62Fixed
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On Linux it is possible to use clone with CLONE_VM, but not CLONE_THREAD,
which is like fork() but much cheaper and avoids swap exhaustion due to momentary
overcommit of swap space.  One has to be very careful in this case to not mutate global
variables such as environ, but it's worth it.

EVALUATION This fix did not work out on 32-bit Linux, and was reversed in b62 using bug-ID 6853336. For more information and history on this issue, see: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6853336 http://mail.openjdk.java.net/pipermail/core-libs-dev/2009-June/001853.html http://sources.redhat.com/bugzilla/show_bug.cgi?id=10311

EVALUATION this is the implementation of 5049299 for linux