RFR: 8324995: Shenandoah: Skip to full gc for humongous allocation failures [v3]

[William Kemper]

On Wed, 31 Jan 2024 21:50:06 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> Shenandoah degenerated cycles do not compact regions. When a humongous allocation fails, it is likely due to fragmentation which is better addressed by a full gc.
>
> William Kemper has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix typo in comment

Not sure I understand:
> cumulative requested humongous size > the amount of humongous memory available at the most recent free-set rebuild operation

Don't we already know that there isn't enough contiguous memory for _this_ request? Wouldn't the value of the accumulated failed humongous request sizes be greater than the size for the _current_ request?

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PR Comment: https://git.openjdk.org/jdk/pull/17638#issuecomment-1935013516