From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH rcu 15/25] rcu-tasks: Remove grace-period fast-path rcu-tasks helper
Date: Wed, 31 Aug 2022 11:12:00 -0700 [thread overview]
Message-ID: <20220831181210.2695080-15-paulmck@kernel.org> (raw)
In-Reply-To: <20220831181207.GA2694717@paulmck-ThinkPad-P17-Gen-1>
Now that the grace-period fast path can only happen during the
pre-scheduler portion of early boot, this fast path can no longer block
run-time RCU Tasks and RCU Tasks Trace grace periods. This commit
therefore removes the conditional cond_resched_tasks_rcu_qs() invocation.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/tree.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 03b089184b37e..0ff7d5eaa3761 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3492,8 +3492,6 @@ void synchronize_rcu(void)
// which allows reuse of ->gp_seq_polled_snap.
rcu_poll_gp_seq_start_unlocked(&rcu_state.gp_seq_polled_snap);
rcu_poll_gp_seq_end_unlocked(&rcu_state.gp_seq_polled_snap);
- if (rcu_init_invoked())
- cond_resched_tasks_rcu_qs();
return; // Context allows vacuous grace periods.
}
if (rcu_gp_is_expedited())
--
2.31.1.189.g2e36527f23
next prev parent reply other threads:[~2022-08-31 18:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-31 18:12 [PATCH rcu 0/7] Polled grace-period updates for v6.1 Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 01/25] rcu: Add full-sized polling for get_completed*() and poll_state*() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 02/25] rcu: Add full-sized polling for get_state() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 03/25] rcutorture: Abstract synchronous and polled API testing Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 04/25] rcutorture: Allow per-RCU-flavor polled double-GP check Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 05/25] rcutorture: Verify RCU reader prevents full polling from completing Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 06/25] rcutorture: Remove redundant RTWS_DEF_FREE check Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 07/25] rcutorture: Verify long-running reader prevents full polling from completing Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 08/25] rcu: Add full-sized polling for start_poll() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 09/25] rcu: Add full-sized polling for start_poll_expedited() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 10/25] rcu: Remove blank line from poll_state_synchronize_rcu() docbook header Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 11/25] rcu: Add full-sized polling for cond_sync_full() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 12/25] rcu: Add full-sized polling for cond_sync_exp_full() Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 13/25] rcu: Disable run-time single-CPU grace-period optimization Paul E. McKenney
2022-08-31 18:11 ` [PATCH rcu 14/25] rcu: Set rcu_data structures' initial ->gpwrap value to true Paul E. McKenney
2022-08-31 18:12 ` Paul E. McKenney [this message]
2022-08-31 18:12 ` [PATCH rcu 16/25] rcu: Make synchronize_rcu() fast path update ->gp_seq counters Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 17/25] rcu: Remove expedited grace-period fast-path forward-progress helper Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 18/25] rcu: Make synchronize_rcu_expedited() fast path update .expedited_sequence Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 19/25] rcu: Remove ->rgos_polled field from rcu_gp_oldstate structure Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 20/25] rcutorture: Adjust rcu_poll_need_2gp() for rcu_gp_oldstate field removal Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 21/25] rcu: Make synchronize_rcu() fastpath update only boot-CPU counters Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 22/25] rcutorture: Use 1-suffixed variable in rcu_torture_write_types() check Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 23/25] rcutorture: Expand rcu_torture_write_types() first "if" statement Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 24/25] rcu: Add functions to compare grace-period state values Paul E. McKenney
2022-08-31 18:12 ` [PATCH rcu 25/25] rcutorture: Limit read-side polling-API testing Paul E. McKenney
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