[aarch64-port-dev ] git: openjdk/aarch64-port: master: 8261023: Document why memory pretouch must be a store

[Thomas Schatzl]

Changeset: be772ffa
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2021-02-04 13:47:51 +0000
URL:       https://git.openjdk.java.net/aarch64-port/commit/be772ffa

8261023: Document why memory pretouch must be a store

Reviewed-by: shade, iwalulya

! src/hotspot/share/runtime/os.cpp