diff options
| author | Frederic Weisbecker <[email protected]> | 2017-12-14 19:18:26 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-12-18 13:46:42 +0100 |
| commit | 2c43838c99d9d23f17eb2bdadafcb2879cca6995 (patch) | |
| tree | ef7ad23f77fc77258a266434e797dfbd7e0c1e8d | |
| parent | bf29cb238dc0656e6564b6a94bb82e11d2129437 (diff) | |
sched/isolation: Enable CONFIG_CPU_ISOLATION=y by default
The "isolcpus=" boot parameter support was always built-in before we
moved the related code under CONFIG_CPU_ISOLATION. Having it disabled by
default is very confusing for people accustomed to use this parameter.
So enable it by dafault to keep the previous behaviour but keep it
optable for those who want to tinify their kernels.
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: John Stultz <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Luiz Capitulino <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: kernel test robot <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | init/Kconfig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index 2934249fba46..690a381adee0 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -461,10 +461,14 @@ endmenu # "CPU/Task time and stats accounting" config CPU_ISOLATION bool "CPU isolation" + default y help Make sure that CPUs running critical tasks are not disturbed by any source of "noise" such as unbound workqueues, timers, kthreads... - Unbound jobs get offloaded to housekeeping CPUs. + Unbound jobs get offloaded to housekeeping CPUs. This is driven by + the "isolcpus=" boot parameter. + + Say Y if unsure. source "kernel/rcu/Kconfig" |