On 06/26/2018 07:38 PM, Roman Kennke wrote: > http://cr.openjdk.java.net/~rkennke/constify-cset/webrev.00/ OK. I think this comment in CollectionSet and HeapRegionSet is fitting for the field declarations: // Bias cset map's base address for fast test if an oop is in cset Thanks, -Aleksey