Re: [PATCH] DevFS support for /dev/cpu/X/(cpuid|msr)

[Russell King <rmk@arm.linux.org.uk>]

On Sun, Jan 06, 2002 at 01:10:10PM -0800, H. Peter Anvin wrote:
> The existence of a CPU creates /dev/cpu/# and registering a node 
> replicates across the /dev/cpu directories.

And, thus, we decend into more /proc crappyness.

After *lots* of discussion and months of waiting, it was decided between
Alan, David Jones, Jeff Garzik, and other affected parties that
/proc/sys/cpu/#/whatever would be a reasonable.  It has even appeared on
lkml a couple of times in the past.

Currently, there is an allocated sysctl number in include/linux/sysctl.h
for /proc/sys/cpu, and it is used by the cpufreq code to provide:

  /proc/sys/cpu/#/speed
  /proc/sys/cpu/#/speed-max
  /proc/sys/cpu/#/speed-min

However, it's true that some of that needs to be pulled out so anything
can use /proc/sys/cpu/#.  Just takes the necessary parties to get together
to do the hard work, and with the right hardware to test it out.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html