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| author | Juri Lelli <juri.lelli@redhat.com> | 2025-06-27 13:51:16 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-07-14 10:59:33 +0200 |
| commit | 440989c10f4e32620e9e2717ca52c3ed7ae11048 (patch) | |
| tree | 6556a1dcf4654e85df016238369c284a28da95a1 /kernel/sched/rt.c | |
| parent | fcc9276c4d331cd1fe9319d793e80b02e09727f5 (diff) | |
| download | linux-next-440989c10f4e32620e9e2717ca52c3ed7ae11048.tar.gz linux-next-440989c10f4e32620e9e2717ca52c3ed7ae11048.zip | |
sched/deadline: Fix accounting after global limits change
A global limits change (sched_rt_handler() logic) currently leaves stale
and/or incorrect values in variables related to accounting (e.g.
extra_bw).
Properly clean up per runqueue variables before implementing the change
and rebuild scheduling domains (so that accounting is also properly
restored) after such a change is complete.
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>
Tested-by: Marcel Ziswiler <marcel.ziswiler@codethink.co.uk> # nuc & rock5b
Link: https://lore.kernel.org/r/20250627115118.438797-4-juri.lelli@redhat.com
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 15d5855c542c..be6e9bcbe82b 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -2886,6 +2886,12 @@ undo: sched_domains_mutex_unlock(); mutex_unlock(&mutex); + /* + * After changing maximum available bandwidth for DEADLINE, we need to + * recompute per root domain and per cpus variables accordingly. + */ + rebuild_sched_domains(); + return ret; } |