Request for review: 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking

[Tao Mao]

Thank you for reviewing, Jesper.
Tao

On 2/5/2013 1:57 PM, Jesper Wilhelmsson wrote:
> Looks good!
> Ship it!
> /Jesper
>
> On 2/2/13 3:37 AM, Tao Mao wrote:
>> 7052429: G1: Avoid unnecessary scanning of humongous regions during
>> concurrent marking
>> https://jbs.oracle.com/bugs/browse/JDK-7052429
>>
>> webrev:
>> http://cr.openjdk.java.net/~tamao/7052429/webrev.00/
>>
>> changeset:
>> Avoid wasted work of _nextMarkBitMap->iterate() when the current region
>> is a humongous region and the first bit is NOT marked, whereas the case
>> where a humonguous region with its first bit marked is properly handled
>> in iterate() routine.