Frederic Weisbecker a22d66eb51 rcu: Apply callbacks processing time limit only on softirq ... commit a554ba288845fd3f6f12311fd76a51694233458a upstream. Time limit only makes sense when callbacks are serviced in softirq mode because: _ In case we need to get back to the scheduler, cond_resched_tasks_rcu_qs() is called after each callback. _ In case some other softirq vector needs the CPU, the call to local_bh_enable() before cond_resched_tasks_rcu_qs() takes care about them via a call to do_softirq(). Therefore, make sure the time limit only applies to softirq mode. Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Neeraj Upadhyay <neeraju@codeaurora.org> Cc: Uladzislau Rezki <urezki@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> [UR: backport to 5.10-stable] Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-05-12 12:25:45 +02:00
..
Kconfig
Kconfig.debug
Makefile
rcu_segcblist.c
rcu_segcblist.h
rcu.h
rcuscale.c
rcutorture.c	rcutorture: Avoid problematic critical section nesting on PREEMPT_RT	2021-11-18 14:03:52 +01:00
refscale.c
srcutiny.c	srcu: Provide polling interfaces for Tiny SRCU grace periods	2021-09-03 10:09:30 +02:00
srcutree.c	srcu: Provide polling interfaces for Tree SRCU grace periods	2021-09-03 10:09:29 +02:00
sync.c
tasks.h	rcu-tasks: Move RTGS_WAIT_CBS to beginning of rcu_tasks_kthread() loop	2021-11-18 14:03:53 +01:00
tiny.c
tree_exp.h	rcu/exp: Mark current CPU as exp-QS in IPI loop second pass	2022-01-27 10:53:55 +01:00
tree_plugin.h	rcu: Don't deboost before reporting expedited quiescent state	2022-03-28 09:57:10 +02:00
tree_stall.h	rcu: Fix stall-warning deadlock due to non-release of rcu_node ->lock	2021-09-15 09:50:28 +02:00
tree.c	rcu: Apply callbacks processing time limit only on softirq	2022-05-12 12:25:45 +02:00
tree.h
update.c	rcu: Reject RCU_LOCKDEP_WARN() false positives	2021-07-20 16:05:38 +02:00