Date: Wed, 26 Oct 2016 12:03:44 -0500
From: Reza Arbab <arbab@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Balbir Singh <bsingharora@gmail.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Bharata B Rao <bharata@linux.vnet.ibm.com>,
        Nathan Fontenot <nfont@linux.vnet.ibm.com>,
        Stewart Smith <stewart@linux.vnet.ibm.com>,
        Alistair Popple <apopple@au1.ibm.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        Tang Chen <tangchen@cn.fujitsu.com>, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org,
        linux-mm@kvack.org
Subject: Re: [PATCH v4 4/5] mm: make processing of movable_node arch-specific
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 <20161025155507.37kv5akdlgo6m2be@arbab-laptop.austin.ibm.com>
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On Wed, Oct 26, 2016 at 09:52:53PM +1100, Michael Ellerman wrote:
>> As far as I know, power has nothing like the SRAT that tells us, at
>> boot, which memory is hotpluggable.
>
>On pseries we have the ibm,dynamic-memory device tree property, which
>can contain ranges of memory that are not yet "assigned to the
>partition" - ie. can be hotplugged later.
>
>So in general that statement is not true.
>
>But I think you're focused on bare-metal, in which case you might be
>right. But that doesn't mean we couldn't have a similar property, if
>skiboot/hostboot knew what the ranges of memory were going to be.

Yes, sorry, I should have qualified that statement to say I wasn't 
talking about pseries.

I can amend this set to actually implement movable_node on power too, 
but we'd have to settle on a name for the dt property. Is 
"linux,movable-node" too on the nose?

-- 
Reza Arbab