diff options
| author |   Anton Blanchard <anton@samba.org> | 2011-07-24 16:33:15 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 15:53:22 +1000 |
| commit | 7bebcf0925f09224393a8992af706fa39aa10395 (patch) | |
| tree | 49ba8f108c16447dcd22869e48232d2721cdd57e /arch/powerpc/include | |
| parent | powerpc/numa: Increase SD_NODES_PER_DOMAIN to 32. (diff) | |
| download | linux-dev-7bebcf0925f09224393a8992af706fa39aa10395.tar.xz linux-dev-7bebcf0925f09224393a8992af706fa39aa10395.zip | |
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>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index d1c1d312f808..13efa4d95e76 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 \ |