RFR: 8277990: NMT: Remove NMT shutdown capability [v2]

[Thomas Stuefe]

On Thu, 2 Dec 2021 18:16:20 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> > Nice cleanup.
> > You missed a few:
> > 
> > * test/lib/jdk/test/whitebox/WhiteBox.java, `NMTChangeTrackingLevel`
> > * test/lib/sun/hotspot/WhiteBox.java, same
> 
> Out of curious, why have two versions?

No clue :)

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PR: https://git.openjdk.java.net/jdk/pull/6640