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authorFrederic Weisbecker <frederic@kernel.org>2017-10-27 05:42:34 +0300
committerIngo Molnar <mingo@kernel.org>2017-10-27 10:55:28 +0300
commit5c4991e24c69737bd41fc2737b1e3980abbf73f9 (patch)
tree2f2b4b49af198c6ed206581c3030fb955fb68843 /init
parent204c083a009378dfa751175b5fcddc75988bab6c (diff)
downloadlinux-5c4991e24c69737bd41fc2737b1e3980abbf73f9.tar.xz
sched/isolation: Split out new CONFIG_CPU_ISOLATION=y config from CONFIG_NO_HZ_FULL
Split the housekeeping config from CONFIG_NO_HZ_FULL. This way we finally separate the isolation code from NOHZ. Although a dependency to CONFIG_NO_HZ_FULL remains for now, while the housekeeping code still deals with NOHZ internals. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Christoph Lameter <cl@linux.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Wanpeng Li <kernellwp@gmail.com> Link: http://lkml.kernel.org/r/1509072159-31808-8-git-send-email-frederic@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 78cb2461012e..6f52e6f4bd9d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -472,6 +472,14 @@ config TASK_IO_ACCOUNTING
endmenu # "CPU/Task time and stats accounting"
+config CPU_ISOLATION
+ bool "CPU isolation"
+ depends on NO_HZ_FULL
+ 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.
+
source "kernel/rcu/Kconfig"
config BUILD_BIN2C