RFR (M): 8207200: Committed > max memory usage when getting MemoryUsage

[Thomas Schatzl]

Hi,

  ping! :)

On Wed, 2018-08-08 at 17:15 +0200, Thomas Schatzl wrote:
> Hi all,
> 
>   can I have reviews for this change that fixes some races when
> reading from G1MonitoringSupport members, causing some assertion
> failing after weeks of running some programs that poll the G1
> MemoryPools.
> 
> It does so by adding a mutex that is held during reading and writing
> them.
> 
> There is also a new explicit call in CollectedHeap to get a
> consistent overall MemoryUsage information instead of the existing
> code looping over the heap's memory pools. That one is problematic
> too otherwise.
> 
> There is still no change in the calculation of the values of the
> MemoryUsage members.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8207200
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8207200/webrev
> Testing:
> hs-tier1-4,jdk-tier1-3
> 
> This change is based on the changes for JDK-8209062.

  these changes have been pushed by now.

Thanks,
  Thomas