[jdk17u-dev] RFR: 8319048: Monitor deflation unlink phase prolongs time to safepoint

[Paul Hohensee]

On Tue, 19 Mar 2024 18:33:35 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Unclean backport to eliminate another safepoint hiccup caused by monitor deflation. The uncleanliness comes mostly from `NULL` vs `nullptr` differences in affected hunks. I chose to accept the new version that uses `nullptr` consistently, even though some `NULL`-s might have been left alone.
> 
> Additional testing:
>   - [x] Linux x86_64 server fastdebug, `all` tests pass

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk17u-dev/pull/2309#pullrequestreview-2007471715