Zqiang 55887adc76 rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle() ... [ Upstream commit e60c122a1614b4f65b29a7bef9d83b9fd30e937a ] The rcuscale.holdoff module parameter can be used to delay the start of rcu_scale_writer() kthread. However, the hung-task timeout will trigger when the timeout specified by rcuscale.holdoff is greater than hung_task_timeout_secs: runqemu kvm nographic slirp qemuparams="-smp 4 -m 2048M" bootparams="rcuscale.shutdown=0 rcuscale.holdoff=300" [ 247.071753] INFO: task rcu_scale_write:59 blocked for more than 122 seconds. [ 247.072529] Not tainted 6.4.0-rc1-00134-gb9ed6de8d4ff #7 [ 247.073400] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.074331] task:rcu_scale_write state:D stack:30144 pid:59 ppid:2 flags:0x00004000 [ 247.075346] Call Trace: [ 247.075660] <TASK> [ 247.075965] __schedule+0x635/0x1280 [ 247.076448] ? __pfx___schedule+0x10/0x10 [ 247.076967] ? schedule_timeout+0x2dc/0x4d0 [ 247.077471] ? __pfx_lock_release+0x10/0x10 [ 247.078018] ? enqueue_timer+0xe2/0x220 [ 247.078522] schedule+0x84/0x120 [ 247.078957] schedule_timeout+0x2e1/0x4d0 [ 247.079447] ? __pfx_schedule_timeout+0x10/0x10 [ 247.080032] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.080591] ? __pfx_process_timeout+0x10/0x10 [ 247.081163] ? __pfx_sched_set_fifo_low+0x10/0x10 [ 247.081760] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.082287] rcu_scale_writer+0x6b1/0x7f0 [ 247.082773] ? mark_held_locks+0x29/0xa0 [ 247.083252] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.083865] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.084412] kthread+0x179/0x1c0 [ 247.084759] ? __pfx_kthread+0x10/0x10 [ 247.085098] ret_from_fork+0x2c/0x50 [ 247.085433] </TASK> This commit therefore replaces schedule_timeout_uninterruptible() with schedule_timeout_idle(). Signed-off-by: Zqiang <qiang.zhang1211@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-23 11:01:05 +02:00
..
Kconfig	rcu: Make TASKS_RUDE_RCU select IRQ_WORK	2022-06-09 10:20:51 +02:00
Kconfig.debug	Merge branch 'strictgp.2020.08.24a' into HEAD	2020-09-03 09:47:42 -07:00
Makefile	rcuperf: Change rcuperf to rcuscale	2020-08-24 18:39:24 -07:00
rcu_segcblist.c	rcu/segcblist: Prevent useless GP start if no CBs to accelerate	2020-09-03 09:39:59 -07:00
rcu_segcblist.h	rcu: Remove kfree_rcu() special casing and lazy-callback handling	2020-01-24 10:24:31 -08:00
rcu.h	srcu: Fix broken node geometry after early ssp init	2021-07-20 16:05:38 +02:00
rcuscale.c	rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle()	2023-09-23 11:01:05 +02:00
rcutorture.c	rcutorture: Avoid problematic critical section nesting on PREEMPT_RT	2021-11-18 14:03:52 +01:00
refscale.c	refscale: Fix uninitalized use of wait_queue_head_t	2023-09-19 12:20:07 +02:00
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	rcu/sync: Simplify the state machine	2019-05-28 09:05:23 -07:00
tasks.h	rcu-tasks: Add trc_inspect_reader() checks for exiting critical section	2023-09-02 09:18:14 +02:00
tiny.c	rcu: Rename *_kfree_callback/*_kfree_rcu_offset/kfree_call_*	2020-06-29 11:59:25 -07:00
tree_exp.h	rcu: Prevent expedited GP from enabling tick on offline CPU	2023-09-02 09:18:13 +02:00
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/kvfree: Avoid freeing new kfree_rcu() memory after old grace period	2023-06-21 15:45:40 +02:00
tree.h	rcu: Prevent lockdep-RCU splats on lock acquisition/release	2023-01-14 10:16:29 +01:00
update.c	rcu: Reject RCU_LOCKDEP_WARN() false positives	2021-07-20 16:05:38 +02:00