From: Reza Arbab <arbab@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Alistair Popple <apopple@au1.ibm.com>
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: Mon, 24 Oct 2016 13:20:00 -0500 [thread overview]
Message-ID: <20161024182000.5g2f3w3x3oqrohqs@arbab-laptop.austin.ibm.com> (raw)
In-Reply-To: <87vawixcxn.fsf@concordia.ellerman.id.au>
On Mon, Oct 24, 2016 at 09:24:04PM +1100, Michael Ellerman wrote:
>The code already looks for "linux,usable-memory" in preference to
>"reg". Can you use that instead?
Yes, we could set the size of "linux,usable-memory" to zero instead of
setting status to "disabled".
I'll send a v5 of this set which drops 1/5 and 2/5. That would be the
only difference here.
>That would have the advantage that existing kernels already understand
>it.
>
>Another problem with using "status" is we could have device trees out
>there that have status = disabled and we don't know about it, and by
>changing the kernel to use that property we break people's systems.
>Though for memory nodes my guess is that's not true, but you never know ...
--
Reza Arbab
next prev parent reply other threads:[~2016-10-24 18:20 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
2016-10-24 10:24 ` Michael Ellerman
2016-10-24 18:20 ` Reza Arbab [this message]
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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