The following commit has been merged into the sched/urgent branch of tip: Commit-ID: 14672f059d83f591afb2ee1fff56858efe055e5a Gitweb: https://git.kernel.org/tip/14672f059d83f591afb2ee1fff56858efe055e5a Author: Shrikanth Hegde <sshegde@xxxxxxxxxxxxx> AuthorDate: Thu, 06 Mar 2025 10:59:53 +05:30 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Thu, 06 Mar 2025 10:21:31 +01:00 sched/deadline: Use online cpus for validating runtime The ftrace selftest reported a failure because writing -1 to sched_rt_runtime_us returns -EBUSY. This happens when the possible CPUs are different from active CPUs. Active CPUs are part of one root domain, while remaining CPUs are part of def_root_domain. Since active cpumask is being used, this results in cpus=0 when a non active CPUs is used in the loop. Fix it by looping over the online CPUs instead for validating the bandwidth calculations. Signed-off-by: Shrikanth Hegde <sshegde@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Reviewed-by: Juri Lelli <juri.lelli@xxxxxxxxxx> Link: https://lore.kernel.org/r/20250306052954.452005-2-sshegde@xxxxxxxxxxxxx --- kernel/sched/deadline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 38e4537..ff4df16 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -3189,7 +3189,7 @@ int sched_dl_global_validate(void) * value smaller than the currently allocated bandwidth in * any of the root_domains. */ - for_each_possible_cpu(cpu) { + for_each_online_cpu(cpu) { rcu_read_lock_sched(); if (dl_bw_visited(cpu, gen))
![]() |