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authorFrederic Weisbecker <frederic@kernel.org>2018-02-21 07:17:26 +0300
committerIngo Molnar <mingo@kernel.org>2018-02-21 11:49:08 +0300
commit1bda3f8087fce9063da0b8aef87f17a3fe541aca (patch)
treeedc54db089d5a761a3fb40abad0fea3b8eb9b5a0 /kernel/sched
parent22ab8bc02a5f6e8ffc418759894f7a6b0b632331 (diff)
downloadlinux-1bda3f8087fce9063da0b8aef87f17a3fe541aca.tar.xz
sched/isolation: Isolate workqueues when "nohz_full=" is set
As we prepare for offloading the residual 1hz scheduler ticks to workqueue, let's affine those to housekeepers so that they don't interrupt the CPUs that don't want to be disturbed. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> 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: Rik van Riel <riel@redhat.com> Cc: Wanpeng Li <kernellwp@gmail.com> Link: http://lkml.kernel.org/r/1519186649-3242-5-git-send-email-frederic@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/isolation.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index b71b436f59f2..a2500c459617 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -3,6 +3,7 @@
* any CPU: unbound workqueues, timers, kthreads and any offloadable work.
*
* Copyright (C) 2017 Red Hat, Inc., Frederic Weisbecker
+ * Copyright (C) 2017-2018 SUSE, Frederic Weisbecker
*
*/
@@ -119,7 +120,7 @@ static int __init housekeeping_nohz_full_setup(char *str)
{
unsigned int flags;
- flags = HK_FLAG_TICK | HK_FLAG_TIMER | HK_FLAG_RCU | HK_FLAG_MISC;
+ flags = HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU | HK_FLAG_MISC;
return housekeeping_setup(str, flags);
}