Message-ID: <571E4A2A.8070908@caviumnetworks.com>
Date:	Mon, 25 Apr 2016 09:47:38 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	Will Deacon <will.deacon@....com>
CC:	David Daney <ddaney.cavm@...il.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Rutland <mark.rutland@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, <x86@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Robert Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Marc Zyngier <Marc.Zyngier@....com>,
	<linux-ia64@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
	<devel@...ica.org>, <linux-kernel@...r.kernel.org>,
	Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH v5 00/14]  ACPI NUMA support for ARM64

On 04/25/2016 04:13 AM, Will Deacon wrote:
> Hi David,
>
> On Tue, Apr 19, 2016 at 06:40:25PM -0700, David Daney wrote:
>> From: David Daney <david.daney@...ium.com>
>>
>> Based on v16 of device-tree NUMA patch set for arm64 [1],this patch
>> set introduce the ACPI based configuration to provide NUMA
>> information.
>>
>> ACPI 5.1 already introduced NUMA support for ARM64, which can get the
>> NUMA domain information from SRAT and SLIT table, so parse those two
>> tables to get mappings from cpu/mem to numa node configuration and
>> system locality.
>
> Whilst I've queued the main NUMA series for arm64, I'd really like to
> see more movement on the generic header file cleanups that you posted
> separately:
>
> http://lkml.kernel.org/r/1456358528-24213-1-git-send-email-ddaney.cavm@gmail.com

FWIW:  Those patches should still apply.  I am carrying them in my 
development trees, and have not changed them in any way.

>
> Given that this ACPI series already requires some significant cross-arch
> interaction (which is actually good!), perhaps extending the clean-up
> patches to encompass some of the ACPI bits might make sense, and we can
> get that queued as a pre-requisite.

The cleanup patches you mention above are really independent of the ACPI 
things.  I have applied them both before and after the ACPI patches, and 
both seem to work.  With a quick perusal of the ACPI patches nothing 
jumps out at me as being a candidate for inclusion in the header file 
cleanup series.

If you think it would be a good idea, I can repost the cleanup series.

David Daney


>
> Will
>
>> v5 updates:
>>
>>   - Fixed ia64 build failure by gating some unused functions with #if
>>     CONFIG_{X86,ARM64}.
>>
>>   - Fixed section mismatch errors for X86 case.
>>
>>   - Removed unneeded #include from some files.
>>
>>   - Tested to build cleanly on ARM64, X86_64, IA64
>>
>> v4 updates:
>>
>>   - Updated from Hanjun Guo's v3 patches.
>>
>>   - Rebased on top of v16 of device-tree NUMA patches.
>>
>>   - Reordered some of the changes so that we don't introduce code and
>>     then change it several times in the patch set.  New code is
>>     introduced in its final form.  Code reused from x86 is first moved
>>     with no change, and then a separate patch to make any needed
>>     changes.
>>
>>   - code that is used only by ia64, moved to architecture specific
>>     files.
>>
>> v3 updates:
>>   - Deep investigation about the ACPI_DEBUG_PRINT() and remvoe
>>     that for acpi/numa.c (patch 2/12)
>>
>>   - Remove the duplicate NULL check for table print (patch 3/12)
>>
>>   - Introduce CONFIG_ACPI_HAS_NUMA_ARCH_FIXUP to remove duplicate
>>     dummy function for acpi_numa_arch_fixup()
>>
>>   - Solve the problem that the mapping from logical cpu to numa node
>>     is wrong which spotted out by Lorenzo
>>
>>   - cleanups for x86 and move acpi_numa_slit_init() and some other
>>     functions to common place, then reduce the duplicate of x86
>>     and arm64 (patch 7-12/12).
>>
>>   - rebased on top of 4.4 and Ganapat's v9 patch set.
>>
>> [1]: https://lkml.org/lkml/2016/4/8/571
>>
>> David Daney (1):
>>    acpi, numa, srat: Improve SRAT error detection and add messages.
>>
>> Hanjun Guo (11):
>>    acpi, numa: Use pr_fmt() instead of printk
>>    acpi, numa: Replace ACPI_DEBUG_PRINT() with pr_debug()
>>    acpi, numa: remove duplicate NULL check
>>    acpi, numa: move acpi_numa_slit_init() to drivers/acpi/numa.c
>>    arm64, numa: rework numa_add_memblk()
>>    x86, acpi, numa: cleanup acpi_numa_processor_affinity_init()
>>    acpi, numa: move bad_srat() and srat_disabled() to
>>      drivers/acpi/numa.c
>>    acpi, numa: remove unneeded acpi_numa=1
>>    acpi, numa: Move acpi_numa_memory_affinity_init() to
>>      drivers/acpi/numa.c
>>    arm64, acpi, numa: NUMA support based on SRAT and SLIT
>>    acpi, numa: Enable ACPI based NUMA on ARM64
>>
>> Robert Richter (2):
>>    acpi, numa: Move acpi_numa_arch_fixup() to ia64 only
>>    arm64, acpi, numa: Default enable ACPI_NUMA with NUMA
>>
>>   arch/arm64/include/asm/acpi.h |   8 ++
>>   arch/arm64/include/asm/numa.h |   2 +
>>   arch/arm64/kernel/Makefile    |   1 +
>>   arch/arm64/kernel/acpi_numa.c | 149 ++++++++++++++++++++++++++++
>>   arch/arm64/kernel/smp.c       |   2 +
>>   arch/arm64/mm/numa.c          |  17 ++--
>>   arch/ia64/include/asm/acpi.h  |   3 +
>>   arch/ia64/kernel/acpi.c       |   2 +-
>>   arch/ia64/kernel/setup.c      |   1 +
>>   arch/x86/include/asm/acpi.h   |   1 -
>>   arch/x86/mm/numa.c            |   2 +-
>>   arch/x86/mm/srat.c            | 116 +---------------------
>>   drivers/acpi/Kconfig          |   4 +-
>>   drivers/acpi/numa.c           | 224 ++++++++++++++++++++++++++++++++----------
>>   drivers/of/of_numa.c          |   4 +-
>>   include/acpi/acpi_numa.h      |   4 +
>>   include/linux/acpi.h          |  18 +++-
>>   17 files changed, 375 insertions(+), 183 deletions(-)
>>   create mode 100644 arch/arm64/kernel/acpi_numa.c
>>
>> --
>> 1.7.11.7
>>

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