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rcu/nocb: Check rdp_gp->nocb_timer in __call_rcu_nocb_wake() 

Currently, only rdp_gp->nocb_timer is used, for nocb_timer of
no-rdp_gp structure, the timer_pending() is always return false,
this commit therefore need to check rdp_gp->nocb_timer in
__call_rcu_nocb_wake().

Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
This commit is contained in:
Zqiang 2024-01-17 18:26:16 +08:00 committed by Boqun Feng
parent dda98810b5
commit f3c4c00784
1 changed files with 2 additions and 1 deletions
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3
kernel/rcu/tree_nocb.h
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@ -564,6 +564,7 @@ static void __call_rcu_nocb_wake(struct rcu_data *rdp, bool was_alldone,
long lazy_len;
long len;
struct task_struct *t;
struct rcu_data *rdp_gp = rdp->nocb_gp_rdp;
// If we are being polled or there is no kthread, just leave.
t = READ_ONCE(rdp->nocb_gp_kthread);
@ -608,7 +609,7 @@ static void __call_rcu_nocb_wake(struct rcu_data *rdp, bool was_alldone,
smp_mb(); /* Enqueue before timer_pending(). */
if ((rdp->nocb_cb_sleep ||
!rcu_segcblist_ready_cbs(&rdp->cblist)) &&
!timer_pending(&rdp->nocb_timer)) {
!timer_pending(&rdp_gp->nocb_timer)) {
rcu_nocb_unlock(rdp);
wake_nocb_gp_defer(rdp, RCU_NOCB_WAKE_FORCE,
TPS("WakeOvfIsDeferred"));