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Subject: Re: [PATCH v6 4/4] of/fdt: mark hotpluggable memory
To: Reza Arbab <arbab@linux.vnet.ibm.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
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        Frank Rowand <frowand.list@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>
References: <1478562276-25539-1-git-send-email-arbab@linux.vnet.ibm.com>
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Cc: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org,
        devicetree@vger.kernel.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>,
        linux-kernel@vger.kernel.org
From: Balbir Singh <bsingharora@gmail.com>
Message-ID: <aea94234-b3d8-1484-d3ab-39e562d7901d@gmail.com>
Date: Thu, 10 Nov 2016 11:56:02 +1100
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On 08/11/16 10:44, Reza Arbab wrote:
> When movable nodes are enabled, any node containing only hotpluggable
> memory is made movable at boot time.
> 
> On x86, hotpluggable memory is discovered by parsing the ACPI SRAT,
> making corresponding calls to memblock_mark_hotplug().
> 
> If we introduce a dt property to describe memory as hotpluggable,
> configs supporting early fdt may then also do this marking and use
> movable nodes.

This looks much better, like the other comments pointed out

We need documentation around the changes. One quick question

Have you tested this across all combinations of skiboot/kexec/SLOF boots?

Balbir Singh.