diff options
| author | Sebastian Andrzej Siewior <[email protected]> | 2021-11-29 18:46:44 +0100 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2021-12-04 10:56:22 +0100 |
| commit | 9d0df37797453f168afdb2e6fd0353c73718ae9a (patch) | |
| tree | 31ff628d481cc9c76881994ff59d69840c3e5a4c | |
| parent | 4e0d84634445ed550498d613a49ea8f6cfa5e66c (diff) | |
sched: Trigger warning if ->migration_disabled counter underflows.
If migrate_enable() is used more often than its counter part then it
remains undetected and rq::nr_pinned will underflow, too.
Add a warning if migrate_enable() is attempted if without a matching a
migrate_disable().
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
| -rw-r--r-- | kernel/sched/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3c9b0fda64ac..300218ad98a2 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2173,6 +2173,9 @@ void migrate_enable(void) return; } + if (WARN_ON_ONCE(!p->migration_disabled)) + return; + /* * Ensure stop_task runs either before or after this, and that * __set_cpus_allowed_ptr(SCA_MIGRATE_ENABLE) doesn't schedule(). |