diff options
| author | Tejun Heo <tj@kernel.org> | 2025-11-05 12:03:08 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-11-05 12:07:09 -1000 |
| commit | 5a629ecbcdffacfb04fc4eb0098c0688f38c8b9d (patch) | |
| tree | 87de683d563850dcf7053ac890a924fcaf971f7d | |
| parent | d723f36e014d296d668b577c0c69cc37be75e6d2 (diff) | |
sched_ext: Mark racy bitfields to prevent adding fields that can't tolerate races
The warned bitfields in struct scx_sched are updated racily from concurrent
CPUs causing RMW races, which is fine for these boolean warning flags. Add a
comment marking this area to prevent future fields that can't tolerate racy
updates from being added here.
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/sched/ext_internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched/ext_internal.h b/kernel/sched/ext_internal.h index fb161fc35328..dd6f25fb6159 100644 --- a/kernel/sched/ext_internal.h +++ b/kernel/sched/ext_internal.h @@ -895,6 +895,10 @@ struct scx_sched { struct scx_dispatch_q **global_dsqs; struct scx_sched_pcpu __percpu *pcpu; + /* + * Updates to the following warned bitfields can race causing RMW issues + * but it doesn't really matter. + */ bool warned_zero_slice:1; bool warned_deprecated_rq:1; |