hg: jdk8u/hs-dev/hotspot: 8076325: java hangs with -XX:ParallelGCThreads=0 -XX:+ExplicitGCInvokesConcurrent options

[stefan.karlsson at oracle.com]

Changeset: 9b582718fbea
Author:    sangheki
Date:      2015-04-09 10:16 -0700
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/9b582718fbea

8076325: java hangs with  -XX:ParallelGCThreads=0 -XX:+ExplicitGCInvokesConcurrent options
Summary: Added a guard of gc workers > 0 to execute logic.
Reviewed-by: stefank, mgerdin

! src/share/vm/gc_implementation/g1/g1RootProcessor.cpp