RFR: 8198225: os::attempt_reserve_memory_at records memory as committed

[Aleksey Shipilev]

On 02/15/2018 04:19 PM, Stefan Karlsson wrote:
> Please review this small patch to fix the NMT memory tracking for os::attempt_reserve_memory_at.
> 
> http://cr.openjdk.java.net/~stefank/8198225/webrev.01/

*) Minor typo, "givining":
   65           // It's not necessarily a bug, so givining up.

Otherwise looks good!

-Aleksey