RFR: 8272161: Make evacuation failure data structures local to collection [v2]

[Thomas Schatzl]

> Hi all,
> 
>   can I have reviews for this change that moves some evacuation (failure) related data structures into the per-thread evacuation context (`G1ParThreadScanState`) which removes some young collection related code from G1CollectedHeap?
> 
> Testing: tier1-5
> 
> Thanks,
>   Thomas

Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:

  Preserved marks stacks must be allocated on C heap.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5066/files
  - new: https://git.openjdk.java.net/jdk/pull/5066/files/2fc966ac..0def9589

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5066&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5066&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5066.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5066/head:pull/5066

PR: https://git.openjdk.java.net/jdk/pull/5066