6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m
7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification
7027529: CMS: retire CMSUseOldDefaults flag
Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago.
Reviewed-by: brutisso, poonam

Summary: Count enable_icms() and disable_icms() events so as to prevent inteference between concurrent calls, which can cause the iCMS thread to be left stranded in icms_wait() with an unserviced request and no young allocations to unwedge it.
Reviewed-by: jcoomes, poonam

Summary: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Reviewed-by: johnc, jmasa, ysr

7023747: G1: too strict assert in RefineRecordRefsIntoCSCardTableEntryClosure::do_card_ptr in g1RemSet.cpp
Summary: Made sure that the assert looks at ParallelGCThreads.
Reviewed-by: stefank, tonyp, jwilhelm, johnc

Summary: Introduced buffered loggging to make sure that log lines are logged one line at a time
Reviewed-by: stefank, johnc, dsamersoff

Reviewed-by: phh, kvn

Summary: Some G1 code cleanup.
Reviewed-by: johnc, jcoomes, jwilhelm

Summary: Ensure safe exception handler table is generated on Win32 binaries when compile with VS2010
Reviewed-by: acorn, coleenp, dcubed, sla, ohair

Summary: Added overflow detection in arena Amalloc methods
Reviewed-by: coleenp, phh

Summary: #define _WIN32_WINNT 0x500
Reviewed-by: ohrstrom, hosterda, coleenp

Summary: Add special rule to allow assignment of frames with uninit flags set.
Reviewed-by: never, coleenp

Summary: Make the G1 specific version of is_in_closed_subset() available in all builds.
Reviewed-by: tonyp, jcoomes

Reviewed-by: dsamersoff, kamg, hosterda

Summary: Dynamic-code generated events should be deferred and processed by service thread
Reviewed-by: dsamersoff, dcubed

Summary: Update the HS21 build number to 03
Reviewed-by: jcoomes

Summary: removed erroneous flags
Reviewed-by: kvn, dcubed

Reviewed-by: kvn, jrose

Summary: Allocate ordinary object arrays
Reviewed-by: ysr, never, mchung

Summary: Increase default SharedMiscDataSize
Reviewed-by: dcubed, kamg

Summary: see synopsis
Reviewed-by: acorn, coleenp

Summary: fix hashtable.hpp to qualify non-dependant name with "this"
Reviewed-by: phh, never, poonam
Contributed-by: volker.simonis@gmail.com