linux-kernel - Re: [PATCH v2 16/17] libnvdimm: Add sysfs numa

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Date:	Fri, 26 Jun 2015 08:26:44 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Toshi Kani <toshi.kani@...com>
Cc:	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	Jens Axboe <axboe@...nel.dk>,
	Boaz Harrosh <boaz@...xistor.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v2 16/17] libnvdimm: Add sysfs numa_node to NVDIMM devices

On Thu, Jun 25, 2015 at 7:21 PM, Toshi Kani <toshi.kani@...com> wrote:
> On Thu, 2015-06-25 at 05:37 -0400, Dan Williams wrote:
>> From: Toshi Kani <toshi.kani@...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@...com>
>> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
>
> Can you please update the commit log with the following?  It reflects
> the changes in sysfs btt files.

Done, thanks!
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