Subject: sched: Limit the number of task migrations per batch From: Thomas Gleixner Date: Mon, 06 Jun 2011 12:12:51 +0200 Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.8/older/patches-4.8.14-rt9.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 --- kernel/sched/core.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -129,7 +129,11 @@ const_debug unsigned int sysctl_sched_fe * Number of tasks to iterate in a single balance run. * Limited because this is done with IRQs disabled. */ +#ifndef CONFIG_PREEMPT_RT_FULL const_debug unsigned int sysctl_sched_nr_migrate = 32; +#else +const_debug unsigned int sysctl_sched_nr_migrate = 8; +#endif /* * period over which we average the RT time consumption, measured