Re: [RFD PATCH 2/4] cpu: sysfs interface for hotplugging bunch of CPUs.

[Nathan Lynch <ntl@pobox.com>]

Gautham R Shenoy <ego@in.ibm.com> writes:
> echo 2,3 > /sys/devices/system/cpu/offline #Offlines CPUs 2 and 3
> echo 4 > /sys/devices/sytem/cpu/offline    #Offlines CPU 4
> echo 2-4 > /sys/devices/system/cpu/online  #Onlines CPU 2,3,4
>
> This patch changes the permissions of these sysfs files from 0444 to 0644.
> It provides a dummy store function, which currently parses the input
> provided by the user and copies them to another debug cpumask structure,
> which can be accessed using the sysfs interfaces:
> 	/sys/devices/system/cpu/debug_offline
> and
> 	/sys/devices/system/cpu/debug_online
>
> Thus on performing a
> 	echo 2,3 > /sys/devices/system/cpu/offline
> the operation
> 	cat /sys/devices/system/cpu/debug_offline
> should yield
> 	2-3
> as the result.

These debug_(on|off)line attributes aren't intended to be in the final
result, are they?  They don't seem useful beyond the development phase
of this feature...