tree 49ba8f108c16447dcd22869e48232d2721cdd57e
parent d4761ad2ef18ec2c9a0037d6649c0afc4a7b907d
author Anton Blanchard <anton@samba.org> 1311525195 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1316498002 +1000

powerpc/numa: Disable NEWIDLE balancing at node level

On big POWER7 boxes we see large amounts of CPU time in system
processes like workqueue and watchdog kernel threads.

We currently rebalance the entire machine each time a task goes
idle and this is very expensive on large machines. Disable newidle
balancing at the node level and rely on the scheduler tick to
rebalance across nodes.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>