RFR: 8304442: Allocate VirtualMemoryTracker into Arena

Tue Mar 28 12:01:30 UTC 2023

On Tue, 28 Mar 2023 08:56:43 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> > These sorted regions are never deleted?
> 
> They are, via `VMT::remove_released_region`.

I don't understand then; would this not leak memory if we randomly remove regions? Since with an Arena, you only can effectively reclaim the topmost allocation?

Easy check: call os::reserve_memory/commit_memory a million times with random - and disjunct - address ranges. If RSS stays stable, we are good.

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PR Comment: https://git.openjdk.org/jdk/pull/13190#issuecomment-1486734277