[8u] RFA: 8168628/8171452: (fc) SIGBUS when extending file size to map it

[Seán Coffey]

Approved.

regards,
Sean.

On 06/02/2018 00:40, David Buck wrote:
> Hi!
>
> Please approve this backport of jdk8168628 to JDK 8. As jdk8168628 
> introduced a regression (jdk8171452), I have also included the small 
> fix for that in my backport as it makes sense to push them both at the 
> same time.
>
> bug report (original bug):
> [ (fc) SIGBUS when extending file size to map it ]
> https://bugs.openjdk.java.net/browse/JDK-8168628
>
> bug report (minor regression fix added to above fix):
> [ (ch) linux io_util_md: Operation not supported exception after 
> 8168628 ]
> https://bugs.openjdk.java.net/browse/JDK-8171452
>
> code review of backport:
> http://mail.openjdk.java.net/pipermail/nio-dev/2018-February/004673.html
>
> I have tested the backport extensively, including building all platforms
> supported by JPRT for JDK 8, several runs of the "core" jprt testset,
> and manually confirming the fix with the test case included in the
> changeset itself (both with and without RAF).
>
> Cheers,
> -Buck