hg: jdk7/hotspot-gc/hotspot: 6923430: G1: assert(res != 0,"This should have worked."); ...

[john.cuthbertson at oracle.com]

Changeset: c33825b68624
Author:    johnc
Date:      2011-02-02 10:41 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/c33825b68624

6923430: G1: assert(res != 0,"This should have worked.")
7007446: G1: expand the heap with a single step, not one region at a time
Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation.
Reviewed-by: brutisso, tonyp

! src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
! src/share/vm/gc_implementation/g1/g1RemSet.cpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp