RFR (S) CR 6857566: (bf) DirectByteBuffer garbage creation can outpace reclamation

[Alan Bateman]

On 02/10/2013 07:43, Aleksey Shipilev wrote:
> Hi,
>
> There is the issue that annoys me all the time:
>    https://bugs.openjdk.java.net/browse/JDK-6857566
>
> Please review the rework of DirectByteBuffer cleanup mechanics fixing
> that issue. Since DBB uses sun.misc.Cleaner as the infrastructure to
> clean up things, we focus there:
>    http://cr.openjdk.java.net/~shade/6857566/webrev.00/
>
I'd like to review, I just don't have time at the moment. One thing that 
I'd like to understand is the implication of moving from phantom to weak 
references. Also the impact on mapped buffers (map implementation in 
sun.nio.ch.FileChannelImpl) which will need to be changed too. Also I 
think we will need to include a short-running stress test as part of 
this change.

-Alan