Re: [PATCH] cpuset and sched domains: sched_load_balance flag

From: Ingo Molnar
Date: Sun Sep 30 2007 - 13:34:34 EST

* Paul Jackson <pj@xxxxxxx> wrote:

> Add a new per-cpuset flag called 'sched_load_balance'.
> When enabled in a cpuset (the default value) it tells the kernel
> scheduler that the scheduler should provide the normal load balancing
> on the CPUs in that cpuset, sometimes moving tasks from one CPU to a
> second CPU if the second CPU is less loaded and if that task is
> allowed to run there.
> When disabled (write "0" to the file) then it tells the kernel
> scheduler that load balancing is not required for the CPUs in that
> cpuset.

i like this, this feature would be quite useful for -rt and CPU

( a cpuset is a mandatory container for set_cpus_allowed(), so there is
a material and app-visible difference between a 4-CPU cpuset that has
balancing disabled and 4x 1-CPU cpusets. )

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