From: David Daney <ddaney@caviumnetworks.com>
To: Rob Herring <robh@kernel.org>
Cc: David Daney <ddaney.cavm@gmail.com>,
Will Deacon <will.deacon@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Frank Rowand <frowand.list@gmail.com>,
Grant Likely <grant.likely@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>,
Robert Richter <rrichter@cavium.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
David Daney <david.daney@cavium.com>
Subject: Re: [PATCH v11 08/10] dt, numa: Add NUMA dt binding implementation.
Date: Tue, 1 Mar 2016 08:57:35 -0800 [thread overview]
Message-ID: <56D5C9FF.8020500@caviumnetworks.com> (raw)
In-Reply-To: <CAL_JsqLoTh_ZTUT26g4wz=6sofuRpFDCc_Aw+Oq66p8cGMp19g@mail.gmail.com>
On 03/01/2016 08:47 AM, Rob Herring wrote:
> On Thu, Feb 25, 2016 at 7:26 PM, David Daney <ddaney@caviumnetworks.com> wrote:
>> On 02/23/2016 11:36 AM, Rob Herring wrote:
>>>
>>> On Fri, Feb 19, 2016 at 05:13:17PM -0800, David Daney wrote:
>>>>
>>>> From: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>
>>>>
>>>> ADD device tree node parsing for NUMA topology using device
>>>> "numa-node-id" property distance-map.
>>>
>>>
>>> I still want an adequate explanation why NUMA setup cannot be done with
>>> an unflattened tree. PowerPC manages to do that and should have a
>>> similar init flow being memblock based, so I would expect arm64 can too.
>>
>>
>> Many things could be done. Really, we want to know what *should* be done.
>>
>> In the context of the current arm64 memory initialization we (more or less)
>> do:
>>
>> 1) early_init_fdt_scan_reserved_mem();
>> 2) memory_present()
>> 3) sparse_init()
>> 4) other things
>> 5) unflatten_device_tree()
>>
>> We are already reading information out of the FDT at #1.
>>
>> This patch set adds a step between 1 and 2 where we read NUMA information
>> out of the FDT.
>
> The dependency on unflattening is that memblock is up and we can
> allocate a chunk from it. Isn't that dependency met by step 1
No.
> or is
> there a dependency on sparsemem (or something else)?
Will Deacon talked about this over here:
https://lkml.org/lkml/2016/2/26/782
I am happy to modify the patch set, but I don't want to get stuck as an
intermediary between two opposing blocs.
David Daney
next prev parent reply other threads:[~2016-03-01 16:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-20 1:13 [PATCH v11 00/10] arm64, numa: Add numa support for arm64 platforms David Daney
2016-02-20 1:13 ` [PATCH v11 01/10] of/fdt: make generic early_init_dt_add_memory_arch() a weak alias David Daney
2016-02-20 1:13 ` [PATCH v11 02/10] arm64: override generic version of early_init_dt_add_memory_arch() David Daney
2016-02-20 1:13 ` [PATCH v11 03/10] efi: move FDT handling to separate object file David Daney
2016-02-20 1:13 ` [PATCH v11 04/10] arm64/efi: move EFI /chosen node parsing before early FDT processing David Daney
2016-02-20 1:13 ` [PATCH v11 05/10] arm64/efi: ignore DT memory nodes instead of removing them David Daney
2016-02-20 1:13 ` [PATCH v11 06/10] arm64/efi: ignore DT memreserve entries " David Daney
2016-02-20 1:13 ` [PATCH v11 07/10] Documentation, dt, numa: dt bindings for NUMA David Daney
2016-02-20 1:13 ` [PATCH v11 08/10] dt, numa: Add NUMA dt binding implementation David Daney
2016-02-23 19:36 ` Rob Herring
2016-02-26 1:26 ` David Daney
2016-02-26 18:27 ` Will Deacon
2016-03-01 16:56 ` Rob Herring
2016-03-01 16:47 ` Rob Herring
2016-03-01 16:57 ` David Daney [this message]
2016-03-01 17:43 ` Rob Herring
2016-03-01 17:58 ` David Daney
2016-02-20 1:13 ` [PATCH v11 09/10] arm64, numa: Add NUMA support for arm64 platforms David Daney
2016-02-20 1:13 ` [PATCH v11 10/10] arm64, mm, numa: Add NUMA balancing support for arm64 David Daney
2016-02-20 8:20 ` [PATCH v11 00/10] arm64, numa: Add numa support for arm64 platforms Ard Biesheuvel
2016-02-20 10:39 ` Robert Richter
2016-02-20 10:44 ` Ard Biesheuvel
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