Re: [PATCH v9 3/6] arm64/arm, numa, dt: adding numa dt binding implementation for arm64 platforms.
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- To: Ganapatrao Kulkarni <gpkulkarni@xxxxxxxxx>
- Subject: Re: [PATCH v9 3/6] arm64/arm, numa, dt: adding numa dt binding implementation for arm64 platforms.
- From: Will Deacon <will.deacon@xxxxxxx>
- Date: Thu, 28 Jan 2016 18:08:24 +0000
- Cc: Bjorn Helgaas <helgaas@xxxxxxxxxx>, Ganapatrao Kulkarni <gkulkarni@xxxxxxxxxxxxxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, "devicetree@xxxxxxxxxxxxxxx" <devicetree@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, linux-pci@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-metag@xxxxxxxxxxxxxxx, linuxppc-dev <linuxppc-dev@xxxxxxxxxxxxxxxx>, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, Catalin Marinas <catalin.marinas@xxxxxxx>, Grant Likely <grant.likely@xxxxxxxxxx>, Leif Lindholm <leif.lindholm@xxxxxxxxxx>, rfranz@xxxxxxxxxx, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, "msalter@xxxxxxxxxx" <msalter@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>, Steve Capper <steve.capper@xxxxxxxxxx>, Hanjun Guo <hanjun.guo@xxxxxxxxxx>, Al Stone <al.stone@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Pawel Moll <pawel.moll@xxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>, Kumar Gala <galak@xxxxxxxxxxxxxx>, "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>, Len Brown <lenb@xxxxxxxxxx>, Marc Zyngier <marc.zyngier@xxxxxxx>, Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, tony.luck@xxxxxxxxx, fenghua.yu@xxxxxxxxx, james.hogan@xxxxxxxxxx, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, mingo@xxxxxxxxxx, hpa@xxxxxxxxx, x86@xxxxxxxxxx, Jon Masters <jonathan@xxxxxxxxxxxxxx>, Robert Richter <rrichter@xxxxxxxxxx>, Prasun Kapoor <Prasun.Kapoor@xxxxxxxxxxxxxxxxxx>
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On Thu, Jan 28, 2016 at 10:42:17PM +0530, Ganapatrao Kulkarni wrote:
> On Thu, Jan 28, 2016 at 8:09 PM, Will Deacon <will.deacon@xxxxxxx> wrote:
> > On Tue, Jan 26, 2016 at 02:36:04PM -0600, Bjorn Helgaas wrote:
> >> Subject is "arm64/arm, numa, dt: adding ..." What is the significance
> >> of the "arm" part? The other patches only mention "arm64".
> >>
> >> General comment: the code below has little, if anything, that is
> >> actually arm64-specific. Maybe this is the first DT-based NUMA
> >> platform? I don't see other similar code for other arches, so maybe
> >> it's too early to try to generalize it, but we should try to avoid
> >> adding duplicates of this code if/when other arches do show up.
> >
> > Having it in the core code would allow us to share it with arch/arm/
> > fairly straightforwardly.
> This binding can be used for arm too.
> however at this moment it is the need of arm64 platforms.
> can we please keep this to arm64 as it's too early to try to
> generalize it(as Bjorn suggested)
> I prefer to keep it as it is, otherwise ok.
> Please suggest.
My suggestions time and time again on the NUMA patches from you have
consistently been around consolidation of existing code, or moving things
that aren't architecture-specific out of the architecture code.
Will
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