johnc [Fri, 01 Oct 2010 21:48:40 -0700] rev 6767
Merge
johnc [Fri, 01 Oct 2010 18:23:16 -0700] rev 6766
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
Summary: Clear the concurrent marking "in progress" flag while the FullGCCount_lock is held. This avoids a race that can cause back to back System.gc() calls, when ExplicitGCInvokesConcurrent is enabled, to fail to initiate a marking cycle causing the requesting thread to hang.
Reviewed-by: tonyp, ysr
ysr [Fri, 01 Oct 2010 16:12:54 -0700] rev 6765
6794422: Perm gen expansion policy for concurrent collectors
Summary: Concurrent collectors should expand the perm gen without a full STW GC, but possibly by triggering a concurrent collection. Temporary band-aid for G1 where no concurrent collection is kicked off since the perm gen is not collected concurrently.
Reviewed-by: johnc
jcoomes [Thu, 30 Sep 2010 12:15:13 -0700] rev 6764
6988678: fatal error deadlock handling was unintentionally disabled
Reviewed-by: ysr
ysr [Wed, 29 Sep 2010 16:17:02 -0700] rev 6763
6692906: CMS: parallel concurrent marking may be prone to hanging or stalling mutators for periods of time
Summary: Inserted missing yield(check)s in closures used during the work-stealing phase of parallel concurrent marking, a missing synchronous yield-request in the cms perm gen allocation path, and a terminator-terminator for the offer_termination invocation that monitors the yield status of the concurrent marking task. Elaborated some documentation comments and made some task queue termination loop flags configurable at start-up to aid debugging in the field.
Reviewed-by: jmasa, johnc, poonam
jcoomes [Tue, 28 Sep 2010 15:56:15 -0700] rev 6762
6423256: GC stacks should use a better data structure
6942771: SEGV in ParScanThreadState::take_from_overflow_stack
Reviewed-by: apetrusenko, ysr, pbk
johnc [Tue, 28 Sep 2010 09:51:37 -0700] rev 6761
6941395: G1: Use only lock-free versions of region stack push() and pop()
Summary: Re-enable use of the lock-free versions of region stack push() and pop() by recording aborted regions in a thread-local structure, which are then processed when scanning of the region stack restarts. The previous locking versions of these routines are retained for diagnostic purposes.
Reviewed-by: tonyp, ysr