linux-kernel - Re: [PATCH v6 00/14] ACPI NUMA support for ARM64

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Date:	Thu, 12 May 2016 00:29:02 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	David Daney <ddaney@...iumnetworks.com>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	Will Deacon <will.deacon@....com>,
	David Daney <ddaney.cavm@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<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>,
	"the arch/x86 maintainers" <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-ia64@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	"devel@...ica.org" <devel@...ica.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>,
	Jon Masters <jcm@...hat.com>
Subject: Re: [PATCH v6 00/14] ACPI NUMA support for ARM64

On Wed, May 11, 2016 at 11:30 PM, David Daney <ddaney@...iumnetworks.com> wrote:
> On 05/11/2016 02:22 PM, Rafael J. Wysocki wrote:
>>
>> On Wed, May 11, 2016 at 11:08 PM, David Daney <ddaney@...iumnetworks.com>
>> wrote:
>>>
>>> On 05/11/2016 01:35 PM, Rafael J. Wysocki wrote:
>>>>
>>>>
>>>> On Wed, May 11, 2016 at 12:40 PM, Will Deacon <will.deacon@....com>
>>>> wrote:
>>>>>
>>>>>
>>>>> On Wed, May 11, 2016 at 02:43:11AM +0200, Rafael J. Wysocki wrote:
>>>>>>
>>>>>>
>>>>>> On Wed, Apr 27, 2016 at 8:07 PM, David Daney <ddaney.cavm@...il.com>
>>>>>> wrote:
>>>>>>>
>>>>>>>
>>>>>>> From: David Daney <david.daney@...ium.com>
>>>>>>>
>>>>>>> Based on
>>>>>>> git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
>>>>>>> for-next/core branch at commit 643d703d2d2d ("arm64: compat: Check
>>>>>>> for
>>>>>>> AArch32 state")
>>>>>
>>>>>
>>>>>
>>>>> [...]
>>>>>
>>>>>>> David Daney (2):
>>>>>>>     arm64, numa: Cleanup NUMA disabled messages.
>>>>>>>     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 (1):
>>>>>>>     acpi, numa: Move acpi_numa_arch_fixup() to ia64 only
>>>>>>
>>>>>>
>>>>>>
>>>>>> I need ACKs from the ARM64 maintainers on patches [6-7/13] and
>>>>>> [13-14/14].
>>>>>
>>>>>
>>>>>
>>>>> There's also a dependency on the arm64 for-next/core branch, so I've
>>>>> been
>>>>> largely ignoring this as far as 4.6 is concerned and was planning to
>>>>> take
>>>>> a proper look for 4.7 once the upcoming merge window is out of the way.
>>>>
>>>>
>>>>
>>>> That would be 4.7 and 4.8 respectively I suppose?
>>>>
>>>> Anyway, Catalin has ACKed all of them except for the [13/14], so
>>>> technically I can apply [1-12/14] now and then [13-14/14] can be
>>>> applied when they are ready.
>>>>
>>>> Do you think there will be any problems with merging [6-7/14] into 4.7
>>>> via the ACPI tree?
>>>>
>>>
>>> I would defer to the arm64 maintainers for decisions about the arm64
>>> specific parts of the patch set.  That said, many of the arm64 specific
>>> patches depend on the arm64 for-next/core branch, so you would have to be
>>> careful about merge ordering if you pull these in before the
>>> for-next/core
>>> branch is merged.
>>
>>
>> Fair enough.  I will wait for an update then.
>>
>>> Also FWIW, I plan on addressing Catalin's comments about 13/14 and
>>> posting a
>>> new version of the patch set in the next day or two.
>>
>>
>> OK, but in that case it won't be considered for 4.7 (at least not by
>> me), so I'd suggest sending it in the second half of the 4.7 merge
>> window (or about that time).
>
>
> To be candid, I would very much like for you to pull in as many of the
> patches as you are comfortable with as soon as possible.
>
> I don't know where Will and Catalin stand on this, and their opinion is
> obviously important, but getting 1-12/14 merged to v4.7 and deferring the
> last two for v4.8 would simplify the whole process for me.  The drawback is
> carrying dead code around until the final parts are merged.

That is not unheard of, however.

OK, I'll try to put the [1-12/14] into my linux-next branch early next
week and we'll see if that triggers any conflicts.