From: Reza Arbab <arbab@linux.vnet.ibm.com>
To: Alistair Popple <apopple@au1.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org,
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>,
Stewart Smith <stewart@linux.vnet.ibm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Tang Chen <tangchen@cn.fujitsu.com>,
linux-mm@kvack.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Bharata B Rao <bharata@linux.vnet.ibm.com>,
Nathan Fontenot <nfont@linux.vnet.ibm.com>
Subject: Re: [PATCH v4 2/5] drivers/of: do not add memory for unavailable nodes
Date: Sat, 22 Oct 2016 20:51:08 -0500 [thread overview]
Message-ID: <20161023015107.527l4fvnh2nrup5u@arbab-vm> (raw)
In-Reply-To: <2344394.NlaWgtFOqB@new-mexico>
Hi Alistair,
On Fri, Oct 21, 2016 at 05:22:54PM +1100, Alistair Popple wrote:
>From what I can tell it seems that kernels without this patch will try
>and use this memory even if it is marked in the device-tree as
>status="disabled" which could lead to problems for older kernels when
>we start exporting this property from firmware.
>
>Arguably this might not be such a problem in practice as we probably
>don't have many (if any) existing kernels that will boot on hardware
>exporting these properties.
Yes, I think you've got it right.
>However given this patch seems fairly independent perhaps it is worth
>sending as a separate fix if it is not going to make it into this
>release?
Michael,
If this set as a whole is going to miss the release, would it be helpful
for me to resend 1/5 and 2/5 as a separate set? They are the minimum
needed to prevent the possible forward compatibility issue Alistair
describes.
--
Reza Arbab
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next prev parent reply other threads:[~2016-10-23 1:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-06 18:36 [PATCH v4 0/5] powerpc/mm: movable hotplug memory nodes Reza Arbab
2016-10-06 18:36 ` [PATCH v4 1/5] drivers/of: introduce of_fdt_device_is_available() Reza Arbab
2016-10-06 18:36 ` [PATCH v4 2/5] drivers/of: do not add memory for unavailable nodes Reza Arbab
2016-10-11 13:58 ` Rob Herring
2016-10-21 6:22 ` Alistair Popple
2016-10-23 1:51 ` Reza Arbab [this message]
2016-10-24 10:24 ` Michael Ellerman
2016-10-24 18:20 ` Reza Arbab
2016-10-06 18:36 ` [PATCH v4 3/5] powerpc/mm: allow memory hotplug into a memoryless node Reza Arbab
2016-10-20 3:30 ` Balbir Singh
2016-10-20 14:38 ` Reza Arbab
2016-10-25 9:39 ` Michael Ellerman
2016-10-06 18:36 ` [PATCH v4 4/5] mm: make processing of movable_node arch-specific Reza Arbab
2016-10-07 6:37 ` Aneesh Kumar K.V
2016-10-11 12:26 ` Balbir Singh
2016-10-25 12:15 ` Balbir Singh
2016-10-25 15:55 ` Reza Arbab
2016-10-25 22:34 ` Balbir Singh
2016-10-26 0:49 ` Reza Arbab
2016-10-26 10:52 ` Michael Ellerman
2016-10-26 17:03 ` Reza Arbab
2016-10-25 22:59 ` Balbir Singh
2016-10-06 18:36 ` [PATCH v4 5/5] mm: enable CONFIG_MOVABLE_NODE on non-x86 arches Reza Arbab
2016-10-07 6:40 ` Aneesh Kumar K.V
2016-10-11 13:17 ` Balbir Singh
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