hg: jdk7/hotspot-gc/hotspot: 7033292: G1: nightly failure: Non-dirty cards in region that should be dirty

[tony.printezis at oracle.com]

Changeset: c84ee870e0b9
Author:    tonyp
Date:      2011-04-04 13:18 -0400
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/c84ee870e0b9

7033292: G1: nightly failure: Non-dirty cards in region that should be dirty
Summary: The epochs on the card cache array are initialized to 0 and our initial epoch also starts at 0. So, until the first GC, it might be possible to successfully "claim" a card which was in fact never initialized.
Reviewed-by: johnc, iveresov, ysr

! src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp