Messages in this thread Patch in this message | | | From | Zqiang <> | Subject | [PATCH] rcu: When rcuog kthreads is in polling mode, wakeup waitqueue is not requried | Date | Fri, 28 Jan 2022 11:13:46 +0800 |
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When grace period cleanup, the rcuog kthreads that waiting in sq waitqueue will be awakened, however if the 'rcu_nocb_poll' is set, the sq waitqueue always empty, so if 'rcu_nocb_poll' is set, return directly.
Signed-off-by: Zqiang <qiang1.zhang@intel.com> --- kernel/rcu/tree_nocb.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 636d0546a4e9..9e106c590e56 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -201,6 +201,8 @@ static void rcu_lockdep_assert_cblist_protected(struct rcu_data *rdp) */ static void rcu_nocb_gp_cleanup(struct swait_queue_head *sq) { + if (rcu_nocb_poll) + return; swake_up_all(sq); } -- 2.25.1
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