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Disable biased locking altogether #4

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@rkennke rkennke commented May 11, 2021

In anticipation of eventual removal of biased locking (see JDK-8256425), I'd like to always disable BL in Lilliput. This makes room in the header to put the compressed Klass* in the upper 32 bit. With BL, it would clash with the Thread* there.


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  • Change must not contain extraneous whitespace
  • Change must be properly reviewed



Using git

Checkout this PR locally:
$ git fetch pull/4/head:pull/4
$ git checkout pull/4

Update a local copy of the PR:
$ git checkout pull/4
$ git pull pull/4/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 4

View PR using the GUI difftool:
$ git pr show -t 4

Using diff file

Download this PR as a diff file:

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@bridgekeeper bridgekeeper bot commented May 11, 2021

👋 Welcome back rkennke! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

@openjdk openjdk bot added the rfr label May 11, 2021
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@mlbridge mlbridge bot commented May 11, 2021


warning("Biased Locking is not supported with Lilliput build"
"; ignoring UseBiasedLocking flag." );
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@shipilev shipilev May 11, 2021

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I'd leave it as one line, up to you.

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@openjdk openjdk bot commented May 11, 2021

@rkennke This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file for details.

After integration, the commit message for the final commit will be:

Disable biased locking altogether

Reviewed-by: shade

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@openjdk openjdk bot added the ready label May 11, 2021
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@rkennke rkennke commented May 12, 2021


@openjdk openjdk bot closed this May 12, 2021
@openjdk openjdk bot added integrated and removed ready rfr labels May 12, 2021
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@openjdk openjdk bot commented May 12, 2021

@rkennke Pushed as commit 8ac2ee2.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

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