sysctl dev.rtc.max-user-freq no longer exists in the kernel

[Vincent Hervieux]

Chuck Anderson <cra <at> WPI.EDU> writes:

> 
> What happened to this sysctl?  It appears that some stuff depends on 
> this setting, e.g. kqemu.  There is only a hpet.max-user-freq now and 
> I get this funky permission error on 'sysctl -a':
> 
> # /sbin/sysctl -a | grep freq
> error: permission denied on key 'kernel.sched_nr_migrate'
> dev.hpet.max-user-freq = 64
> 
> # /sbin/sysctl -n -q dev.rtc.max-user-freq
> error: "dev.rtc.max-user-freq" is an unknown key
> 

Seems this has been introduce in kernel 2.6.24.2 with the sched.c fix to avoid
latencies.

in /proc/sys/kernel we can see that 

--w----r-T 1 root root 0 mar  4 22:26 sched_nr_migrate

sched_nr_migrate is not readable, but I don't know how to change its
attributes!! If somebody could help!