Fixed 6952853: SIGSEGV with UseAdaptiveGCBoundary on 64b linux running jvm2008 Shrinking of a generation and the corresponding card table was causing part of the card table to be uncommitted. This fix is a workaround to not shrink the card table when UseAdaptiveGCBoundary is on. http://cr.openjdk.java.net/~jmasa/6952853/webrev.00/