[crac] RFR: Prevent an assertion: Attempting to acquire lock PeriodicTask_lock... [v2]

[Jan Kratochvil]

> Prevent an assertion: `Attempting to acquire lock PeriodicTask_lock/safepoint out of order with lock Threads_lock/safepoint-1 -- possible deadlock`

Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:

  Move a part of wakeup_threads_in_timedwait() out of VM_Operation.
   - suggested by Anton Kozlov

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Changes:
  - all: https://git.openjdk.org/crac/pull/106/files
  - new: https://git.openjdk.org/crac/pull/106/files/78daa0f3..ee770814

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=106&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=106&range=00-01

  Stats: 33 lines in 1 file changed: 4 ins; 21 del; 8 mod
  Patch: https://git.openjdk.org/crac/pull/106.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/106/head:pull/106

PR: https://git.openjdk.org/crac/pull/106