On Thu, 2010-01-14 at 14:56 -0800, Stephen Hemminger wrote:

On Thu, 14 Jan 2010 13:56:23 -0800 (PST)
Tom Herbert [off-list ref] wrote:

[...]

quoted

The CPU masks is set on a per device basis in the sysfs variable
/sys/class/net/<device>/rps_cpus.  This is a set of canonical bit maps for
each NAPI nstance of the device.  For example:

echo "0b 0b0 0b00 0b000" > /sys/class/net/eth0/rps_cpus

Why not make a kobject out of cpus which would add subdirectory.
This would keep interface consistent with the one value per file
semantic of sysfs.

Do you mean a kobject per NAPI context, each initially with a rps_cpus
attribute holding a CPU mask, or a kobject per CPU, each with an
attribute specifying which NAPI contexts it does work for?  (Personally
I'd favour the first.)

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.