linux-kernel - Re: [PATCH v5 6/9] ACPI/PPTT: Add topology parsing code

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Date:   Wed, 13 Dec 2017 23:28:35 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Jeremy Linton <jeremy.linton@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Will Deacon <will.deacon@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>, jhugo@...eaurora.org,
        wangxiongfeng2@...wei.com, Jonathan.Zhang@...ium.com,
        Al Stone <ahs3@...hat.com>, Jayachandran.Nair@...ium.com,
        austinwc@...eaurora.org, Len Brown <lenb@...nel.org>
Subject: Re: [PATCH v5 6/9] ACPI/PPTT: Add topology parsing code

On Wed, Dec 13, 2017 at 6:38 PM, Lorenzo Pieralisi
<lorenzo.pieralisi@....com> wrote:
> On Tue, Dec 12, 2017 at 10:13:08AM -0600, Jeremy Linton wrote:
>> Hi,
>>
>> First, thanks for taking a look at this.
>>
>> On 12/11/2017 07:12 PM, Rafael J. Wysocki wrote:
>> >On Friday, December 1, 2017 11:23:27 PM CET Jeremy Linton wrote:
>> >>The PPTT can be used to determine the groupings of CPU's at
>> >>given levels in the system. Lets add a few routines to the PPTT
>> >>parsing code to return a unique id for each unique level in the
>> >>processor hierarchy. This can then be matched to build
>> >>thread/core/cluster/die/package/etc mappings for each processing
>> >>element in the system.
>> >>
>> >>Signed-off-by: Jeremy Linton <jeremy.linton@....com>
>> >
>> >Why can't this be folded into patch [2/9]?
>>
>> It can, and I will be happy squash it.
>>
>> It was requested that the topology portion of the parser be split
>> out back in v3.
>>
>> https://www.spinics.net/lists/linux-acpi/msg78487.html
>
> I asked to split cache/topology since I am not familiar with cache
> code and Sudeep - who looks after the cache code - won't be able
> to review this series in time for v4.16.

OK, so why do we need it in 4.16?