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Message-ID: <20240818234520.90186-2-longman@redhat.com>
Date: Sun, 18 Aug 2024 19:45:18 -0400
From: Waiman Long <longman@...hat.com>
To: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>,
Mel Gorman <mgorman@...e.de>,
Valentin Schneider <vschneid@...hat.com>,
Frederic Weisbecker <frederic@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Waiman Long <longman@...hat.com>
Subject: [PATCH 1/3] sched/isolation: Add HK_FLAG_SCHED to nohz_full
The HK_FLAG_SCHED/HK_TYPE_SCHED flag is defined and is also used
in kernel/sched/fair.c since commit de201559df87 ("sched/isolation:
Introduce housekeeping flags"). However, the corresponding cpumask isn't
currently updated anywhere. So the mask is always cpu_possible_mask.
Add it in nohz_full setup so that nohz_full CPUs will now be removed
from HK_TYPE_SCHED cpumask.
Signed-off-by: Waiman Long <longman@...hat.com>
---
kernel/sched/isolation.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index 5891e715f00d..a514994af319 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -196,7 +196,7 @@ static int __init housekeeping_nohz_full_setup(char *str)
unsigned long flags;
flags = HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU |
- HK_FLAG_MISC | HK_FLAG_KTHREAD;
+ HK_FLAG_MISC | HK_FLAG_KTHREAD | HK_FLAG_SCHED;
return housekeeping_setup(str, flags);
}
--
2.43.5
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