Re: [PATCH v5] Documentation, dt, numa: Add note to empty NUMA node

From: Randy Dunlap
Date: Mon Jun 28 2021 - 12:15:26 EST


On 6/28/21 2:34 AM, Gavin Shan wrote:
> The empty memory nodes, where no memory resides in, are allowed.
> For these empty memory nodes, the 'len' of 'reg' property is zero.
> The NUMA node IDs are still valid and parsed, but memory may be
> added to them through hotplug afterwards. I finds difficulty to
> get where it's properly documented.
>
> So lets add a section for empty memory nodes in NUMA binding
> document. Also, the 'unit-address', equivalent to 'base-address'
> in the 'reg' property of these empty memory nodes is suggested to
> be the summation of highest memory address plus the NUMA node ID.
>
> Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
> ---
> v5: Separate section for empty memory node
> ---
> Documentation/devicetree/bindings/numa.txt | 61 +++++++++++++++++++++-
> 1 file changed, 60 insertions(+), 1 deletion(-)
>

LGTM. Thanks.

Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

--
~Randy