From: Yong Zhang <[email protected]> The code fails to update tg->rt_bandwidth.[rt_period | rt_runtime] if we have RT_GROUP_SCHED enabled. And if we lower the value of sched_rt_runtime_us, we get error as "write error: Invalid argument".
Fix it by calling tg_set_rt_bandwidth() instead when setting sched_rt_[period|runtime]_us. Signed-off-by: Yong Zhang <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> --- kernel/sched/core.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 5ac63c9..c77d298 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7035,11 +7035,7 @@ static int sched_rt_global_constraints(void) if (runtime > period && runtime != RUNTIME_INF) return -EINVAL; - mutex_lock(&rt_constraints_mutex); - read_lock(&tasklist_lock); - ret = __rt_schedulable(NULL, 0, 0); - read_unlock(&tasklist_lock); - mutex_unlock(&rt_constraints_mutex); + ret = tg_set_rt_bandwidth(&root_task_group, period, runtime); return ret; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
