Request for review - 8011268: NPG: Free unused VirtualSpaceNodes

[Jon Masamitsu]

This version incorporates the code review comments and fixes
some bugs uncovered by the changes.

http://cr.openjdk.java.net/~jmasa/8011268/webrev.01/

This version does not free the current VirtualSpaceNode.
I tried it but backed it out to simply the code while debugging.  I
will try it again later (but not with this set of changes).

This is a webrev based on the changes for 8011173.

http://cr.openjdk.java.net/~jmasa/8011173/webrev.00/

Jon

On 4/3/2013 9:00 PM, Jon Masamitsu wrote:
> After class unloading deallocate any VirtualSpaceNodes not being used.
>
> When the classes for a dead class loader are unloaded, all the Metachunks
> that had been used by that class loader are put on the Metachunk
> free list for later reuse.   If all the Metachunks allocated out of a
> VirtualSpaceNode are on the Metachunk free list, remove the Metachunks
>  from the free list and deallocate the VirtualSpaceNode.
>
> The constructor for VirtualSpaceNode was moved to be below the 
> definition of
> SpaceManager.
>
> http://cr.openjdk.java.net/~jmasa/8011268/webrev.00/
>
> Thanks.
>
> Jon