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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:06:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:06:00 +0000
commitb15a952c52a6825376d3e7f6c1bf5c886c6d8b74 (patch)
tree1500f2f8f276908a36d8126cb632c0d6b1276764 /debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch
parentAdding upstream version 5.10.209. (diff)
downloadlinux-debian.tar.xz
linux-debian.zip
Adding debian version 5.10.209-2.debian/5.10.209-2debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch')
-rw-r--r--debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch33
1 files changed, 33 insertions, 0 deletions
diff --git a/debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch b/debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch
new file mode 100644
index 000000000..c157da12c
--- /dev/null
+++ b/debian/patches-rt/0214-sched-Limit-the-number-of-task-migrations-per-batch.patch
@@ -0,0 +1,33 @@
+From a178dbd2a3f8eeedf39cde9582a29bc95f335b17 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Mon, 6 Jun 2011 12:12:51 +0200
+Subject: [PATCH 214/323] sched: Limit the number of task migrations per batch
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.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 aaeed4b14278..3d7e9ecbd376 100644
+--- a/kernel/sched/core.c
++++ b/kernel/sched/core.c
+@@ -65,7 +65,11 @@ 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
++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.
+--
+2.43.0
+