tree da5a44e076e3ea4ae2517023fe1e937b9af21d15
parent 9c7b5257f8444b33aa84324c08be6fbd539ca60c
author Antonios Printezis <tonyp@openjdk.org> 1295483442 -0500
committer Antonios Printezis <tonyp@openjdk.org> 1295483442 -0500

6977804: G1: remove the zero-filling thread

This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification.

Reviewed-by: jcoomes, johnc