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SubjectRe: [PATCH v2 16/17] libnvdimm: Add sysfs numa_node to NVDIMM devices
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On Thu, 2015-06-25 at 05:37 -0400, Dan Williams wrote:
> From: Toshi Kani <toshi.kani@hp.com>
>
> Add support of sysfs 'numa_node' to I/O-related NVDIMM devices
> under /sys/bus/nd/devices, regionN, namespaceN.0, and bttN.
> When bttN is not set up, its numa_node returns -1 (NUMA_NO_NODE).
>
> An example of numa_node values on a 2-socket system with a single
> NVDIMM range on each socket is shown below.
> /sys/bus/nd/devices
> |-- btt0/numa_node:-1
> |-- btt1/numa_node:0
> |-- namespace0.0/numa_node:0
> |-- namespace1.0/numa_node:1
> |-- region0/numa_node:0
> |-- region1/numa_node:1
>
> These numa_node files are then linked under the block class of
> their device names.
> /sys/class/block/pmem0/device/numa_node:0
> /sys/class/block/pmem0s/device/numa_node:0
> /sys/class/block/pmem1/device/numa_node:1
>
> This enables numactl(8) to accept 'block:' and 'file:' paths of
> pmem and btt devices as shown in the examples below.
> numactl --preferred block:pmem0 --show
> numactl --preferred file:/dev/pmem0s --show
>
> Signed-off-by: Toshi Kani <toshi.kani@hp.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Can you please update the commit log with the following? It reflects
the changes in sysfs btt files.

Thanks,
-Toshi

=====
From: Toshi Kani <toshi.kani@hp.com>

Add support of sysfs 'numa_node' to I/O-related NVDIMM devices
under /sys/bus/nd/devices, regionN, namespaceN.0, and bttN.x.

An example of numa_node values on a 2-socket system with a single
NVDIMM range on each socket is shown below.
/sys/bus/nd/devices
|-- btt0.0/numa_node:0
|-- btt1.0/numa_node:1
|-- btt1.1/numa_node:1
|-- namespace0.0/numa_node:0
|-- namespace1.0/numa_node:1
|-- region0/numa_node:0
|-- region1/numa_node:1

These numa_node files are then linked under the block class of
their device names.
/sys/class/block/pmem0/device/numa_node:0
/sys/class/block/pmem1s/device/numa_node:1

This enables numactl(8) to accept 'block:' and 'file:' paths of
pmem and btt devices as shown in the examples below.
numactl --preferred block:pmem0 --show
numactl --preferred file:/dev/pmem1s --show

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>



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