RFR: 8232107: support ThreadPriorityPolicy flag on AIX

[Langer, Christoph]

Hi Matthias, David,

first of all, +1 from my side.

I think it's beneficial to make AIX behave most similar to Linux at this place. Whether the whole feature should be terminally deprecated and removed is a different discussion. Just my 5cents ��

Cheers
Christoph

> -----Original Message-----
> From: hotspot-dev <hotspot-dev-bounces at openjdk.java.net> On Behalf Of
> David Holmes
> Sent: Samstag, 12. Oktober 2019 01:18
> To: Baesken, Matthias <matthias.baesken at sap.com>; 'hotspot-
> dev at openjdk.java.net' <hotspot-dev at openjdk.java.net>
> Subject: Re: RFR: 8232107: support ThreadPriorityPolicy flag on AIX
> 
> On 12/10/2019 12:20 am, Baesken, Matthias wrote:
> > Hello, please review the following small change .
> > It adds  support  for the   ThreadPriorityPolicy flag on AIX   (and brings the
> implementation in os_aix  closer  to  what we have in os_linux ).
> 
> In that sense this is reviewed. But ...
> 
> > While  ThreadPriorityPolicy   is an "old"   flag, we have some customers
> using it  so it would be nice to support it  on all UNIX platforms .
> 
> "support" is a strong word. It's affects are well defined in the sense
> of what the policy will change, but it is completely untested and
> anything that messes with priority could easily induce problems inside
> the VM. Caveat Emptor.
> 
> To me this is a candidate for removal, not extended adoption.
> 
> Cheers,
> David
> -----
> 
> >
> > Bug / webrev :
> >
> > https://bugs.openjdk.java.net/browse/JDK-8232107
> >
> > http://cr.openjdk.java.net/~mbaesken/webrevs/8232107.0/
> >
> >
> > Best regards, Matthias
> >