8u backport RFR: 6515172 and 8148987 (Linux availableProcessors fixes)

[David Holmes]

Hi Andreas,

On 3/05/2016 11:18 PM, Andreas Eriksson wrote:
> Hi,
>
> Please review the backport of these two fixes:
> 6515172: Runtime.availableProcessors() ignores Linux taskset command
> 8148987: [Linux] Allow building on older systems without CPU_ALLOC support
>
> Bugs:
> https://bugs.openjdk.java.net/browse/JDK-6515172
> https://bugs.openjdk.java.net/browse/JDK-8148987
>
> Webrevs:
> http://cr.openjdk.java.net/~aeriksso/6515172/webrev.00/
> http://cr.openjdk.java.net/~aeriksso/8148987/webrev.00/

I assume you will actually commit this a single changeset (under a 
separate CR) not as two changesets - one for each backport? The change 
for 6515172 won't compile on 8u so that changeset should never exist as 
it stands in 8u. I would want to see a single changeset and a 
corresponding webrev showing the final code against the existing code.

Thanks,
David

> Changes to jdk9:
> No unified logging, so a new Linux-only diagnostic flag,
> PrintActiveCpus, added instead.
> A few changes to the test were needed because of testlibrary differences.
>
> Thanks,
> Andreas