Is it possible to disable numa_balance after boot?

Hi,

is possible to turn of numa balancing (introduced in 3.8) in a running kernel?

I'm running a recent arch kernel and numa balancing is enabled by
default. I checked
several documents and found some sysctl variable which influence the behavior of
numa balance, but there is no clear documentation if it's possible to
disable it.

The only defined way to disable it is using a kernel parameter

numa_balancing= [KNL,X86] Enable or disable automatic NUMA balancing.
Allowed values are enable and disable

Is there any other way?

Best regards,
Andreas


$ uname -a
Linux inwest 3.12.6-1-ARCH #1 SMP PREEMPT Fri Dec 20 19:39:00 CET 2013
x86_64 GNU/Linux

$ cat /usr/src/linux-3.12.6-1-ARCH/.config | grep NUMA_BALANCING
CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y
CONFIG_NUMA_BALANCING=y

$ ls -l /proc/sys/kernel | grep numa_bal
-rw-r--r-- 1 root root 0 Jan  4 14:23 numa_balancing_scan_delay_ms
-rw-r--r-- 1 root root 0 Jan  4 14:23 numa_balancing_scan_period_max_ms
-rw-r--r-- 1 root root 0 Jan  4 14:23 numa_balancing_scan_period_min_ms
-rw-r--r-- 1 root root 0 Jan  4 14:23 numa_balancing_scan_period_reset
-rw-r--r-- 1 root root 0 Jan  4 14:23 numa_balancing_scan_size_mb