diff options
Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0106-sched-Limit-the-number-of-task-migrations-per-batch.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/debian/patches-rt/0106-sched-Limit-the-number-of-task-migrations-per-batch.patch b/debian/patches-rt/0106-sched-Limit-the-number-of-task-migrations-per-batch.patch new file mode 100644 index 000000000..7c34d3924 --- /dev/null +++ b/debian/patches-rt/0106-sched-Limit-the-number-of-task-migrations-per-batch.patch @@ -0,0 +1,33 @@ +From 6447e629affa080b84d75e0f685848104a5601ee Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Mon, 6 Jun 2011 12:12:51 +0200 +Subject: [PATCH 106/347] sched: Limit the number of task migrations per batch +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +Put an upper limit on the number of tasks which are migrated per batch +to avoid large latencies. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +--- + kernel/sched/core.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/kernel/sched/core.c b/kernel/sched/core.c +index 0f949b7738fd..4cc39856c4c6 100644 +--- a/kernel/sched/core.c ++++ b/kernel/sched/core.c +@@ -44,7 +44,11 @@ const_debug unsigned int sysctl_sched_features = + * Number of tasks to iterate in a single balance run. + * Limited because this is done with IRQs disabled. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++const_debug unsigned int sysctl_sched_nr_migrate = 8; ++#else + const_debug unsigned int sysctl_sched_nr_migrate = 32; ++#endif + + /* + * period over which we measure -rt task CPU usage in us. +-- +2.36.1 + |