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To: Reza Arbab <arbab@linux.vnet.ibm.com>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 Paul Mackerras <paulus@samba.org>, Andrew Morton <akpm@linux-foundation.org>
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: linux-mm@kvack.org, John Allen <jallen@linux.vnet.ibm.com>,
 linuxppc-dev@lists.ozlabs.org, Nathan Fontenot <nfont@linux.vnet.ibm.com>
Subject: Re: powerpc/mm: allow memory hotplug into an offline node
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Date: Wed,  1 Feb 2017 12:05:31 +1100 (AEDT)
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On Wed, 2016-11-16 at 16:45:03 UTC, Reza Arbab wrote:
> Relax the check preventing us from hotplugging into an offline node.
> 
> This limitation was added in commit 482ec7c403d2 ("[PATCH] powerpc numa:
> Support sparse online node map") to prevent adding resources to an
> uninitialized node.
> 
> These days, there is no harm in doing so. The addition will actually
> cause the node to be initialized and onlined; add_memory_resource()
> calls hotadd_new_pgdat() (if necessary) and node_set_online().
> 
> Cc: Balbir Singh <bsingharora@gmail.com>
> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
> Cc: John Allen <jallen@linux.vnet.ibm.com>
> Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/2a8628d41602dc9f988af051a657ee

cheers