From: Anton Blanchard Date: Sun, 24 Jul 2011 16:33:15 +0000 (+0000) Subject: powerpc/numa: Disable NEWIDLE balancing at node level X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=7bebcf0925f09224393a8992af706fa39aa10395;p=linux-edison.git 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 Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index d1c1d312f80..13efa4d95e7 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -75,7 +75,7 @@ static inline int pcibus_to_node(struct pci_bus *bus) .forkexec_idx = 0, \ \ .flags = 1*SD_LOAD_BALANCE \ - | 1*SD_BALANCE_NEWIDLE \ + | 0*SD_BALANCE_NEWIDLE \ | 1*SD_BALANCE_EXEC \ | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \