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| author |   Frederic Weisbecker <frederic@kernel.org> | 2018-02-21 05:17:26 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-02-21 09:49:08 +0100 |
| commit | 1bda3f8087fce9063da0b8aef87f17a3fe541aca (patch) | |
| tree | edc54db089d5a761a3fb40abad0fea3b8eb9b5a0 /kernel/sched/isolation.c | |
| parent | nohz: Allow to check if remote CPU tick is stopped (diff) | |
| download | linux-dev-1bda3f8087fce9063da0b8aef87f17a3fe541aca.tar.xz linux-dev-1bda3f8087fce9063da0b8aef87f17a3fe541aca.zip | |
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/isolation.c')
| -rw-r--r-- | kernel/sched/isolation.c | 3 |
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); } |