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author | Thomas Gleixner <tglx@linutronix.de> | 2011-06-06 12:12:51 +0200 |
---|---|---|
committer | Alex Shi <alex.shi@linaro.org> | 2017-12-14 10:13:32 +0800 |
commit | 80afdfbac6825c6a34c548f426920a969df0e010 (patch) | |
tree | a5e374d67a38425ecff7f2f019410452984ed9e7 | |
parent | 920c6ebca50c98eb0565a0d32c7b0405dd1d311c (diff) |
sched: Limit the number of task migrations per batchlinux-linaro-lsk-v4.14-rt-test
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>
(cherry picked from commit 6c6a9fafeb1ec04ee2a4d64f2a6bae3be3ad0151)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
(cherry picked from commit d8b520462cd355455350e551322769737be7d46c)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
-rw-r--r-- | kernel/sched/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index da8ff1a9a06a..ec1758fc0daf 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -64,7 +64,11 @@ 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. */ +#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 |