RFR (T): 8224042 Add private alignDown method to MappedByteBuffer

Andrew Dinn adinn at redhat.com
Thu May 16 14:49:40 UTC 2019

Please review this trivial change to MapperByteBuffer which encapsulates
the page align down operation in a suitably named method.

JIRA:   https://bugs.openjdk.java.net/browse/JDK-8224042
webrev: http://cr.openjdk.java.net/~adinn/8224042/webrev.00/

This was successfully exercised by running


The test rounds down a sequence of sub-page offsets to successive pages
within a mapped buffer during testing of MappedByteBuffer method force().


Andrew Dinn
Senior Principal Software Engineer
Red Hat UK Ltd
Registered in England and Wales under Company Registration No. 03798903
Directors: Michael Cunningham, Michael ("Mike") O'Neill, Eric Shander

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