(v0.51.0) Redesign preparePinnedVirtualThreadForUnmount logic #21514
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Remove use of objectMonitorInflate on lock that current thread doesn't own. Change to use of FLC bit to signal owner thread to inflate the monitor when it exits the monitor. Use CAS operation to ensure only one thread can update the lockword flag bits to contended flatlock and ignore current lock learning state. Lock reservation is cancelled before inflation/FLC bit set. Signed-off-by: Jack Lu <[email protected]>
babsingh
approved these changes
Mar 28, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Remove use of objectMonitorInflate on lock that current thread doesn't own. Change to use of FLC bit to signal owner thread to inflate the monitor when it exits the monitor.
Use CAS operation to ensure only one thread can update the lockword flag bits to contended flatlock and ignore current lock learning state.
Lock reservation is cancelled before inflation/FLC bit set.
backport of #21459