Integrated: 8255973: Add more logging to debug JDK-8255917

[Yumin Qi]

On Tue, 10 Nov 2020 23:23:29 GMT, Yumin Qi <minqi at openjdk.org> wrote:

> Hi, Please review
> 
>   JDK-8255917 failed on not finding the committed region from the _reserved_regions list when try to add the region to the committed list. It looks like possible the region was released without logged. 
>   Added a log tag for tracing Native Memory Tracking (NMT) add/remove recorded info. This could help us to identify the problem for NMT or the code behind NMT. Function pd_attempt_reserve_memory_at could fail, but no message logged, so added a logging for its failure. 
> 
> Tests: tier1-4, local jtreg.

This pull request has now been integrated.

Changeset: 1d3d64f3
Author:    Yumin Qi <minqi at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/1d3d64f3
Stats:     44 lines in 5 files changed: 36 ins; 0 del; 8 mod

8255973: Add more logging to debug JDK-8255917

Reviewed-by: ccheung, stuefe, iklam

-------------

PR: https://git.openjdk.java.net/jdk/pull/1150