On Wed, Dec 17, 2014 at 8:49 AM, Dan Horák <dan(a)danny.cz> wrote:
On Wed, 17 Dec 2014 08:43:49 -0500
Josh Boyer <jwboyer(a)fedoraproject.org> wrote:
> On Wed, Dec 17, 2014 at 3:00 AM, Timo Schöler <timo(a)riscworks.net>
> wrote:
> > On 12/16/2014 08:03 PM, Michael J Wolf wrote:
> >
> >>> >> Hi
> >>> >> We briefly discussed priorities for Fedora 22 and I had
> >>> >> taken an action item to start an email conversation about
> >>> >> this. So here is what I would like to see for Fedora 22.
> >>> >>
> >>> >> 1) Get the -mcpu and -mtune flags set properly for the LE
> >>> >> build. Should be -mcpu=power7 -mtune=power8
> >>> >
> >>> > done, all packages that honour the Fedora system wide compiler
> >>> > flags use them, if they don't it's a packaging bug
> >>> >
> >>> >> 2) Have a cloud image available
> >>> >> 3) For BE I would like another subarch. Same packages as the
> >>> >> current one but tuned for P8.
> >>> >
> >>> > you mean in addition to ppc64p7? can't we just switch ppc64p7
> >>> > from -mcpu=power7 -mtune=power7 to -mcpu=power7 -mtune=power8?
> >>>
> >>> This makes sense to me as it then mirrors what we have in ppc64le
> >>> and it saves having more targets.
> >>
> >> The disadvantage of this would be to cut off users that have Power
> >> 7 systems and optimized code. So why would people want to
> >> optimize from Fedora 21 to Fedora 22. You would be taking a big
> >> step back in performance. I don't want to suggest keeping a
> >> subarch for each type of POWER system out there. I
> >> was thinking of keeping two. So when the next POWER arch that
> >> comes out, the Power 7 subarch goes away and you would have Power
> >> 8 and the new Power arch.
> >
> > That would mean that enthusiasts like myself, happily running
> > Fedora on a Power 285 workstation, would lose Fedora?
>
> Um, what version of Fedora are you running on that? As far as I know,
> the recent (not End-of-Live) versions of Fedora for POWER don't really
> support anything less than POWER6.
the kernel and user space should work on any Power CPU (some people
successfully updated to F-21 on Mac G5), the limitation is the installer
and how it is invoked
Right, sorry. I should have been more clear. By "support" I meant
"the secondary arch team is only focusing on POWER6 or newer" but
really "POWER7 or newer". Which makes me wonder how older machines
are getting installed when you factor in the installer thing.
josh