diff options
| author | Chen Yu <yu.c.chen@intel.com> | 2026-05-13 23:39:18 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-05-18 22:33:16 +0300 |
| commit | d943b86dfbf4e9b76be30cf90b1b3f82ff9abbac (patch) | |
| tree | 79a1eac18636eb87edd93282f98c0cf030d71c2e | |
| parent | c1e7fe5e75ed11fa85368e5a186472afd3858f3a (diff) | |
| download | linux-d943b86dfbf4e9b76be30cf90b1b3f82ff9abbac.tar.xz | |
sched/cache: Fix rcu warning when accessing sd_llc domain
rcu_dereference_all() should be used to access the
sd_llc domain under RCU protection.
This bug was reported by sashiko.
Fixes: df0d98475954 ("sched/cache: Introduce infrastructure for cache-aware load balancing")
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Co-developed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/2dc49455e861215d8059a1c877953f0b95990038.1778703694.git.tim.c.chen@linux.intel.com
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 76ac6a8100fc..c549ad489c6d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1814,7 +1814,7 @@ static void task_cache_work(struct callback_head *work) for_each_cpu(cpu, cpus) { /* XXX sched_cluster_active */ - struct sched_domain *sd = per_cpu(sd_llc, cpu); + struct sched_domain *sd = rcu_dereference_all(per_cpu(sd_llc, cpu)); unsigned long occ, m_occ = 0, a_occ = 0; int m_cpu = -1, i; |