> ### Summary > This PR just replaces `ThreadCritical` with a lock specific to NMT. > `ThreadCritical` is a big lock and is unnecessary for the purposes of NMT. > I've implemented the new lock with a semaphore so that it can be used early > before VM init. There is also the possibility of adding assertions in places > we expect NMT to have synchronization. I haven't added assertions yet in many > places because some code paths such as the (NMT tests) don't lock yet. I > think it makes sense to close any gaps in locking in another PR in which I > can also add more assertions. > > Testing: > - hotspot_nmt > - gtest:VirtualSpace > - tier1
Robert Toyonaga has updated the pull request incrementally with one additional commit since the last revision: replace tty in pd_release_memory while holding NMT lock. ------------- Changes: - all: https://git.openjdk.org/jdk/pull/20852/files - new: https://git.openjdk.org/jdk/pull/20852/files/4ae0262a..214c342f Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=20852&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20852&range=02-03 Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/20852.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20852/head:pull/20852 PR: https://git.openjdk.org/jdk/pull/20852
