RFR: 8327098: GTest needs larger combination limit

[Kelvin Nilsen]

On Fri, 1 Mar 2024 15:14:15 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> The current value of LogSelectionList::MaxSelections is too small, causing GTest failures.  This increases the value from 256 to 320.
>
> It looks okay, but I have questions: 
>  1. Does it happen in mainline right now?
>  2. Why are we hitting it with [JDK-8324649](https://bugs.openjdk.org/browse/JDK-8324649) PR? I don't see new logging tags added there.

@shipilev: @earthling-amzn shares that he has seen this same failure on our Shenandoah repository and have applied a similar fix there.  It may be that the new ShenandoahFreeSet introduces more combinations of log tags than had been present previously.

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PR Comment: https://git.openjdk.org/jdk/pull/18083#issuecomment-1973548509