Proposal for adding O_DIRECT support into JDK 9

[Brian Burkhalter]

On Sep 4, 2017, at 8:44 PM, huaming.li at oracle.com wrote:

> Maybe we need to add some comments in the test, I'm not sure if @intermittent is needed to be added into test. So when test fails in the future, it can be analyzed quickly.

I don’t know that it’s a good idea to add @intermittent until we know that it is so.

>>                I can add tests for case 1. I think other cases are covered with the existing tests. Please let me know if I missed anything though.
> The major reason I asked above several questions is that direct io works a little different from non-direct io, but currently we don't have a java doc to state this behavior difference, I think it would be helpful for direct io end users if we do so, but I'm not sure where to add this java doc, and how detailed it should be.

I think that the javadoc of ExtendedOpenOption#DIRECT is sufficient. We are assuming that users of this feature are advanced and know how direct I/O works and how to use it. I don’t know that we need to weigh down the documentation with too many details.

Thanks,

Brian
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