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| author | Juri Lelli <juri.lelli@redhat.com> | 2025-06-27 13:51:14 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-07-14 10:59:32 +0200 |
| commit | 9f239df55546ee1d28f0976130136ffd1cad0fd7 (patch) | |
| tree | f1c2e95b8bcd581353fe2134503b1a5638e4ccff /kernel/sched/core.c | |
| parent | 2885daf47081dd1aaf1a588e9d001eb343df1f90 (diff) | |
| download | linux-9f239df55546ee1d28f0976130136ffd1cad0fd7.tar.gz linux-9f239df55546ee1d28f0976130136ffd1cad0fd7.tar.bz2 linux-9f239df55546ee1d28f0976130136ffd1cad0fd7.zip | |
sched/deadline: Initialize dl_servers after SMP
dl-servers are currently initialized too early at boot when CPUs are not
fully up (only boot CPU is). This results in miscalculation of per
runqueue DEADLINE variables like extra_bw (which needs a stable CPU
count).
Move initialization of dl-servers later on after SMP has been
initialized and CPUs are all online, so that CPU count is stable and
DEADLINE variables can be computed correctly.
Fixes: d741f297bceaf ("sched/fair: Fair server interface")
Reported-by: Marcel Ziswiler <marcel.ziswiler@codethink.co.uk>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@codethink.co.uk> # nuc & rock5b
Link: https://lore.kernel.org/r/20250627115118.438797-2-juri.lelli@redhat.com
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 2f8caa9db78d..89b3ed637465 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8371,6 +8371,8 @@ void __init sched_init_smp(void) init_sched_rt_class(); init_sched_dl_class(); + sched_init_dl_servers(); + sched_smp_initialized = true; } |