RFR: 8264821: DirectIOTest fails on a system with large block size

[Chris Hegarty]

On Wed, 14 Apr 2021 01:37:19 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Please review this request to clean up a test. The main change is to ensure that the capacity passed to `ByteBuffer.allocateDirect()` is large enough that when `alignedSlice()` is called on the new buffer, it creates an aligned buffer which does not have size zero due due to position rounding resulting in out-of-bound values. Other changes in the test are cleanup.

Marked as reviewed by chegar (Reviewer).

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

PR: https://git.openjdk.java.net/jdk/pull/3482