linux-kernel - Re: [PATCH v6 1/4] powerpc/mm: allow memory hotplug into a memoryless node

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Message-ID: <87k2ccjet5.fsf@concordia.ellerman.id.au>
Date:   Thu, 10 Nov 2016 12:37:10 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Reza Arbab <arbab@...ux.vnet.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
        devicetree@...r.kernel.org,
        Bharata B Rao <bharata@...ux.vnet.ibm.com>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Stewart Smith <stewart@...ux.vnet.ibm.com>,
        Alistair Popple <apopple@....ibm.com>,
        Balbir Singh <bsingharora@...il.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/4] powerpc/mm: allow memory hotplug into a memoryless node

Reza Arbab <arbab@...ux.vnet.ibm.com> writes:

> Remove the check which prevents us from hotplugging into an empty node.
>
> The original commit b226e4621245 ("[PATCH] powerpc: don't add memory to
> empty node/zone"), states that this was intended to be a temporary measure.
> It is a workaround for an oops which no longer occurs.
>
> Signed-off-by: Reza Arbab <arbab@...ux.vnet.ibm.com>
> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> Acked-by: Balbir Singh <bsingharora@...il.com>
> Cc: Nathan Fontenot <nfont@...ux.vnet.ibm.com>
> Cc: Bharata B Rao <bharata@...ux.vnet.ibm.com>
> ---
>  arch/powerpc/mm/numa.c | 13 +------------
>  1 file changed, 1 insertion(+), 12 deletions(-)

This seems OK from a powerpc perspective.

Acked-by: Michael Ellerman <mpe@...erman.id.au>

cheers