diff options
Diffstat (limited to 'kernel/sched/ext.c')
| -rw-r--r-- | kernel/sched/ext.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 16613631543f..79bb18651cdb 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -3105,6 +3105,12 @@ static s32 scx_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, *found = false; + + /* + * This is necessary to protect llc_cpus. + */ + rcu_read_lock(); + /* * If WAKE_SYNC, the waker's local DSQ is empty, and the system is * under utilized, wake up @p to the local DSQ of the waker. Checking @@ -3147,9 +3153,12 @@ static s32 scx_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, if (cpu >= 0) goto cpu_found; + rcu_read_unlock(); return prev_cpu; cpu_found: + rcu_read_unlock(); + *found = true; return cpu; } |