34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
From 043af6e53425a94e13a6648ac0206a006f2d7792 Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Mon, 6 Jun 2011 12:12:51 +0200
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Subject: [PATCH 107/264] sched: Limit the number of task migrations per batch
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.37-rt19.tar.xz
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Put an upper limit on the number of tasks which are migrated per batch
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to avoid large latencies.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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kernel/sched/core.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/kernel/sched/core.c b/kernel/sched/core.c
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index 4ed3b29cb0c8..f6504beff565 100644
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--- a/kernel/sched/core.c
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+++ b/kernel/sched/core.c
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@@ -44,7 +44,11 @@ const_debug unsigned int sysctl_sched_features =
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* Number of tasks to iterate in a single balance run.
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* Limited because this is done with IRQs disabled.
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*/
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+const_debug unsigned int sysctl_sched_nr_migrate = 8;
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+#else
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const_debug unsigned int sysctl_sched_nr_migrate = 32;
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+#endif
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/*
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* period over which we measure -rt task CPU usage in us.
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--
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2.20.1
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