Summary: The code that calculates the heap region index for an object address incorrectly used signed arithmetic.
Reviewed-by: jcoomes, ysr

Summary: Change G1 flag names to be more consistent and disable some in 'product' mode.
Reviewed-by: tonyp, iveresov

Summary: Added a feedback-driven exponential skipping for parallel RSet scanning.
Reviewed-by: tonyp, apetrusenko

Summary: Turn off G1VerifyConcMarkPrintReachable by default to minimize the amount of verbose output we generate by default.
Reviewed-by: jmasa

Summary: When using compressed oops, rather than chaining the overflowed grey objects' pre-images through their klass words, we use GC-worker thread-local overflow stacks.
Reviewed-by: jcoomes, jmasa

Summary: Make object_iterate() traverse the perm gen
Reviewed-by: apetrusenko, tonyp

Reviewed-by: iveresov, tonyp

Summary: Small fixes to sort out some verbosegc-related incorrectness and a failure
Reviewed-by: apetrusenko

Summary: preparatory but separable changes for method handles
Reviewed-by: kvn, never

Summary: We should mark the regions that continue humongous regions as live if the first region is live.
Reviewed-by: tonyp

Summary: Allow Hotspot builds with latest Windows SDK 6.1 on 64bit Windows 2003
Reviewed-by: ohair, tbell, jcoomes

Summary: Introduces two flags, -XX:-/+G1EnableParallelRSetUpdating and -XX:-/+G1EnableParallelRSetScanning, to turn on/off the "band aid" fix that serializes RSet updating / scanning during GCs.
Reviewed-by: iveresov

Summary: Enabled full verification for humongous regions. Also made sure that the VerifyAfterGC works with deferred updates and G1HRRSFlushLogBuffersOnVerify.
Reviewed-by: tonyp

6728271: G1: Cleanup G1CollectedHeap::get_gc_alloc_regions()
Summary: It allows the last half-full region to be allocated to during a GC to be reused during the next GC.
Reviewed-by: apetrusenko, jcoomes

Summary: Correct the overflow check in ParGCAllocBuffer::allocate(); simplify ParGCAllocBuffer::undo_allocation().
Reviewed-by: apetrusenko, jcoomes, jmasa, minqi, phh, tonyp

Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.
Reviewed-by: never, twisti, jcoomes, coleenp

Reviewed-by: iveresov, tonyp

Summary: Update copyright for files that have been modified in 2009, up to 03/09
Reviewed-by: katleman, tbell, ohair

Summary: A few small fixes to remove some inconsistencies in the concurrent mark-related verbose GC output.
Reviewed-by: jmasa

Summary: The length of the fast cset test vector is decided at the beginning of a GC, but more regions can be added during the GC. The simple fix is to set the length of the fast cset test vector to the max.
Reviewed-by: iveresov

Summary: The _expanded flag of the sparse RSets is not reset and this can leave a RSet in an inconsistent state if it is expanded more than once. Also, we should be iterating over the _cur, instead of the _next, sparse table
Reviewed-by: apetrusenko, iveresov

6720334: G1: don't update RSets of collection set regions during an evacuation pause
Summary: Introduced a deferred update mechanism for delaying the rset updates during the collection pause
Reviewed-by: apetrusenko, tonyp

Reviewed-by: tonyp

Summary: Allocate worker-local overflow stacks, introduced in 6819891, along with ParNewGeneration, rather than with the per-scavenge ParScanThreadState.
Reviewed-by: jmasa

Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung

Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never

Summary: Under certain circumstances (evacuation failure) the pause time is not communicated to the policy and, as a result, the pause time field is not initialized properly.
Reviewed-by: jmasa

Reviewed-by: tonyp

6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
Reviewed-by: tonyp, jmasa

Summary: Substitute a spin loop for most calls to yield() to reduce the stress on the system.
Reviewed-by: tonyp

6797754: G1: combined bugfix
Summary: Implemented a policy to control G1 survivor space parameters.
Reviewed-by: tonyp, iveresov

Summary: Moved pretouching to MutableSpace. Also MutableSpace now turns on page interleaving for the region it covers.
Reviewed-by: jmasa, jcoomes

Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa

Summary: A bunch of performance optimizations to decrease GC pause times in G1.
Reviewed-by: apetrusenko, jmasa, iveresov

Summary: With predefined headers off for gcc, some .inline.hpp files aren't included to make definition visible for inline functions
Reviewed-by: jcoomes, xlu

Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition.
Reviewed-by: ysr, dcubed

Summary: Added safe_object_iterate() for use by JMapPerm.
Reviewed-by: tonyp

Reviewed-by: jmasa, tonyp

Reviewed-by: jmasa, tonyp

Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008
Reviewed-by: katleman, ohair, tbell