linux-kernel - Re: [RFC v2 4/4] powerpc/papr_scm: Add cpu hotplug support for nvdimm pmu device

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Message-ID: <YK0G1nmvhOPimRay@hirez.programming.kicks-ass.net>
Date:   Tue, 25 May 2021 16:16:54 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        maddy@...ux.vnet.ibm.com, santosh@...six.org,
        aneesh.kumar@...ux.ibm.com, vaibhav@...ux.ibm.com,
        dan.j.williams@...el.com, ira.weiny@...el.com,
        atrajeev@...ux.vnet.ibm.com, tglx@...utronix.de,
        rnsastry@...ux.ibm.com
Subject: Re: [RFC v2 4/4] powerpc/papr_scm: Add cpu hotplug support for
 nvdimm pmu device

On Tue, May 25, 2021 at 06:52:16PM +0530, Kajol Jain wrote:
> Patch here adds cpu hotplug functions to nvdimm pmu.

I'm thinking "Patch here" qualifies for "This patch", see
Documentation/process/submitting-patches.rst .

> It adds cpumask to designate a cpu to make HCALL to
> collect the counter data for the nvdimm device and
> update ABI documentation accordingly.
> 
> Result in power9 lpar system:
> command:# cat /sys/devices/nmem0/cpumask
> 0

Is this specific to the papr thing, or should this be in generic nvdimm
code?