rcu: Move RCU-related source code to kernel/rcu directory (4102adab) · Commits · e / devices / android_kernel_xiaomi_sm6125

Documentation/DocBook/device-drivers.tmpl

+4 −1

Original line number	Original line	Diff line number	Diff line
	@@ -87,7 +87,10 @@ X!Iinclude/linux/kobject.h
	!Ekernel/printk/printk.c		!Ekernel/printk/printk.c
	!Ekernel/panic.c		!Ekernel/panic.c
	!Ekernel/sys.c		!Ekernel/sys.c
	!Ekernel/rcupdate.c		!Ekernel/rcu/srcu.c
			!Ekernel/rcu/tree.c
			!Ekernel/rcu/tree_plugin.h
			!Ekernel/rcu/update.c
	</sect1>		</sect1>

	<sect1><title>Device Resource Management</title>		<sect1><title>Device Resource Management</title>

Documentation/kernel-parameters.txt

+57 −38

Original line number	Original line	Diff line number	Diff line
	@@ -2595,7 +2595,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
	ramdisk_size= [RAM] Sizes of RAM disks in kilobytes		ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
	See Documentation/blockdev/ramdisk.txt.		See Documentation/blockdev/ramdisk.txt.

	rcu_nocbs= [KNL,BOOT]		rcu_nocbs= [KNL]
	In kernels built with CONFIG_RCU_NOCB_CPU=y, set		In kernels built with CONFIG_RCU_NOCB_CPU=y, set
	the specified list of CPUs to be no-callback CPUs.		the specified list of CPUs to be no-callback CPUs.
	Invocation of these CPUs' RCU callbacks will		Invocation of these CPUs' RCU callbacks will
	@@ -2608,7 +2608,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
	real-time workloads. It can also improve energy		real-time workloads. It can also improve energy
	efficiency for asymmetric multiprocessors.		efficiency for asymmetric multiprocessors.

	rcu_nocb_poll [KNL,BOOT]		rcu_nocb_poll [KNL]
	Rather than requiring that offloaded CPUs		Rather than requiring that offloaded CPUs
	(specified by rcu_nocbs= above) explicitly		(specified by rcu_nocbs= above) explicitly
	awaken the corresponding "rcuoN" kthreads,		awaken the corresponding "rcuoN" kthreads,
	@@ -2619,126 +2619,145 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
	energy efficiency by requiring that the kthreads		energy efficiency by requiring that the kthreads
	periodically wake up to do the polling.		periodically wake up to do the polling.

	rcutree.blimit= [KNL,BOOT]		rcutree.blimit= [KNL]
	Set maximum number of finished RCU callbacks to process		Set maximum number of finished RCU callbacks to process
	in one batch.		in one batch.

	rcutree.fanout_leaf= [KNL,BOOT]		rcutree.rcu_fanout_leaf= [KNL]
	Increase the number of CPUs assigned to each		Increase the number of CPUs assigned to each
	leaf rcu_node structure. Useful for very large		leaf rcu_node structure. Useful for very large
	systems.		systems.

	rcutree.jiffies_till_first_fqs= [KNL,BOOT]		rcutree.jiffies_till_first_fqs= [KNL]
	Set delay from grace-period initialization to		Set delay from grace-period initialization to
	first attempt to force quiescent states.		first attempt to force quiescent states.
	Units are jiffies, minimum value is zero,		Units are jiffies, minimum value is zero,
	and maximum value is HZ.		and maximum value is HZ.

	rcutree.jiffies_till_next_fqs= [KNL,BOOT]		rcutree.jiffies_till_next_fqs= [KNL]
	Set delay between subsequent attempts to force		Set delay between subsequent attempts to force
	quiescent states. Units are jiffies, minimum		quiescent states. Units are jiffies, minimum
	value is one, and maximum value is HZ.		value is one, and maximum value is HZ.

	rcutree.qhimark= [KNL,BOOT]		rcutree.qhimark= [KNL]
	Set threshold of queued		Set threshold of queued
	RCU callbacks over which batch limiting is disabled.		RCU callbacks over which batch limiting is disabled.

	rcutree.qlowmark= [KNL,BOOT]		rcutree.qlowmark= [KNL]
	Set threshold of queued RCU callbacks below which		Set threshold of queued RCU callbacks below which
	batch limiting is re-enabled.		batch limiting is re-enabled.

	rcutree.rcu_cpu_stall_suppress= [KNL,BOOT]		rcutree.rcu_idle_gp_delay= [KNL]
	Suppress RCU CPU stall warning messages.

	rcutree.rcu_cpu_stall_timeout= [KNL,BOOT]
	Set timeout for RCU CPU stall warning messages.

	rcutree.rcu_idle_gp_delay= [KNL,BOOT]
	Set wakeup interval for idle CPUs that have		Set wakeup interval for idle CPUs that have
	RCU callbacks (RCU_FAST_NO_HZ=y).		RCU callbacks (RCU_FAST_NO_HZ=y).

	rcutree.rcu_idle_lazy_gp_delay= [KNL,BOOT]		rcutree.rcu_idle_lazy_gp_delay= [KNL]
	Set wakeup interval for idle CPUs that have		Set wakeup interval for idle CPUs that have
	only "lazy" RCU callbacks (RCU_FAST_NO_HZ=y).		only "lazy" RCU callbacks (RCU_FAST_NO_HZ=y).
	Lazy RCU callbacks are those which RCU can		Lazy RCU callbacks are those which RCU can
	prove do nothing more than free memory.		prove do nothing more than free memory.

	rcutorture.fqs_duration= [KNL,BOOT]		rcutorture.fqs_duration= [KNL]
	Set duration of force_quiescent_state bursts.		Set duration of force_quiescent_state bursts.

	rcutorture.fqs_holdoff= [KNL,BOOT]		rcutorture.fqs_holdoff= [KNL]
	Set holdoff time within force_quiescent_state bursts.		Set holdoff time within force_quiescent_state bursts.

	rcutorture.fqs_stutter= [KNL,BOOT]		rcutorture.fqs_stutter= [KNL]
	Set wait time between force_quiescent_state bursts.		Set wait time between force_quiescent_state bursts.

	rcutorture.irqreader= [KNL,BOOT]		rcutorture.gp_exp= [KNL]
	Test RCU readers from irq handlers.		Use expedited update-side primitives.

			rcutorture.gp_normal= [KNL]
			Use normal (non-expedited) update-side primitives.
			If both gp_exp and gp_normal are set, do both.
			If neither gp_exp nor gp_normal are set, still
			do both.

	rcutorture.n_barrier_cbs= [KNL,BOOT]		rcutorture.n_barrier_cbs= [KNL]
	Set callbacks/threads for rcu_barrier() testing.		Set callbacks/threads for rcu_barrier() testing.

	rcutorture.nfakewriters= [KNL,BOOT]		rcutorture.nfakewriters= [KNL]
	Set number of concurrent RCU writers. These just		Set number of concurrent RCU writers. These just
	stress RCU, they don't participate in the actual		stress RCU, they don't participate in the actual
	test, hence the "fake".		test, hence the "fake".

	rcutorture.nreaders= [KNL,BOOT]		rcutorture.nreaders= [KNL]
	Set number of RCU readers.		Set number of RCU readers.

	rcutorture.onoff_holdoff= [KNL,BOOT]		rcutorture.object_debug= [KNL]
			Enable debug-object double-call_rcu() testing.

			rcutorture.onoff_holdoff= [KNL]
	Set time (s) after boot for CPU-hotplug testing.		Set time (s) after boot for CPU-hotplug testing.

	rcutorture.onoff_interval= [KNL,BOOT]		rcutorture.onoff_interval= [KNL]
	Set time (s) between CPU-hotplug operations, or		Set time (s) between CPU-hotplug operations, or
	zero to disable CPU-hotplug testing.		zero to disable CPU-hotplug testing.

	rcutorture.shuffle_interval= [KNL,BOOT]		rcutorture.rcutorture_runnable= [BOOT]
			Start rcutorture running at boot time.

			rcutorture.shuffle_interval= [KNL]
	Set task-shuffle interval (s). Shuffling tasks		Set task-shuffle interval (s). Shuffling tasks
	allows some CPUs to go into dyntick-idle mode		allows some CPUs to go into dyntick-idle mode
	during the rcutorture test.		during the rcutorture test.

	rcutorture.shutdown_secs= [KNL,BOOT]		rcutorture.shutdown_secs= [KNL]
	Set time (s) after boot system shutdown. This		Set time (s) after boot system shutdown. This
	is useful for hands-off automated testing.		is useful for hands-off automated testing.

	rcutorture.stall_cpu= [KNL,BOOT]		rcutorture.stall_cpu= [KNL]
	Duration of CPU stall (s) to test RCU CPU stall		Duration of CPU stall (s) to test RCU CPU stall
	warnings, zero to disable.		warnings, zero to disable.

	rcutorture.stall_cpu_holdoff= [KNL,BOOT]		rcutorture.stall_cpu_holdoff= [KNL]
	Time to wait (s) after boot before inducing stall.		Time to wait (s) after boot before inducing stall.

	rcutorture.stat_interval= [KNL,BOOT]		rcutorture.stat_interval= [KNL]
	Time (s) between statistics printk()s.		Time (s) between statistics printk()s.

	rcutorture.stutter= [KNL,BOOT]		rcutorture.stutter= [KNL]
	Time (s) to stutter testing, for example, specifying		Time (s) to stutter testing, for example, specifying
	five seconds causes the test to run for five seconds,		five seconds causes the test to run for five seconds,
	wait for five seconds, and so on. This tests RCU's		wait for five seconds, and so on. This tests RCU's
	ability to transition abruptly to and from idle.		ability to transition abruptly to and from idle.

	rcutorture.test_boost= [KNL,BOOT]		rcutorture.test_boost= [KNL]
	Test RCU priority boosting? 0=no, 1=maybe, 2=yes.		Test RCU priority boosting? 0=no, 1=maybe, 2=yes.
	"Maybe" means test if the RCU implementation		"Maybe" means test if the RCU implementation
	under test support RCU priority boosting.		under test support RCU priority boosting.

	rcutorture.test_boost_duration= [KNL,BOOT]		rcutorture.test_boost_duration= [KNL]
	Duration (s) of each individual boost test.		Duration (s) of each individual boost test.

	rcutorture.test_boost_interval= [KNL,BOOT]		rcutorture.test_boost_interval= [KNL]
	Interval (s) between each boost test.		Interval (s) between each boost test.

	rcutorture.test_no_idle_hz= [KNL,BOOT]		rcutorture.test_no_idle_hz= [KNL]
	Test RCU's dyntick-idle handling. See also the		Test RCU's dyntick-idle handling. See also the
	rcutorture.shuffle_interval parameter.		rcutorture.shuffle_interval parameter.

	rcutorture.torture_type= [KNL,BOOT]		rcutorture.torture_type= [KNL]
	Specify the RCU implementation to test.		Specify the RCU implementation to test.

	rcutorture.verbose= [KNL,BOOT]		rcutorture.verbose= [KNL]
	Enable additional printk() statements.		Enable additional printk() statements.

			rcupdate.rcu_expedited= [KNL]
			Use expedited grace-period primitives, for
			example, synchronize_rcu_expedited() instead
			of synchronize_rcu(). This reduces latency,
			but can increase CPU utilization, degrade
			real-time latency, and degrade energy efficiency.

			rcupdate.rcu_cpu_stall_suppress= [KNL]
			Suppress RCU CPU stall warning messages.

			rcupdate.rcu_cpu_stall_timeout= [KNL]
			Set timeout for RCU CPU stall warning messages.

	rdinit= [KNL]		rdinit= [KNL]
	Format: <full_path>		Format: <full_path>
	Run specified binary instead of /init from the ramdisk,		Run specified binary instead of /init from the ramdisk,

MAINTAINERS

+6 −5

Original line number	Original line	Diff line number	Diff line
	@@ -6903,7 +6903,7 @@ M: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
	S: Supported		S: Supported
	T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git		T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
	F: Documentation/RCU/torture.txt		F: Documentation/RCU/torture.txt
	F: kernel/rcutorture.c		F: kernel/rcu/torture.c

	RDC R-321X SoC		RDC R-321X SoC
	M: Florian Fainelli <florian@openwrt.org>		M: Florian Fainelli <florian@openwrt.org>
	@@ -6930,8 +6930,9 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
	F: Documentation/RCU/		F: Documentation/RCU/
	X: Documentation/RCU/torture.txt		X: Documentation/RCU/torture.txt
	F: include/linux/rcu*		F: include/linux/rcu*
	F: kernel/rcu*		X: include/linux/srcu.h
	X: kernel/rcutorture.c		F: kernel/rcu/
			X: kernel/rcu/torture.c

	REAL TIME CLOCK (RTC) SUBSYSTEM		REAL TIME CLOCK (RTC) SUBSYSTEM
	M: Alessandro Zummo <a.zummo@towertech.it>		M: Alessandro Zummo <a.zummo@towertech.it>
	@@ -7618,8 +7619,8 @@ M: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
	W: http://www.rdrop.com/users/paulmck/RCU/		W: http://www.rdrop.com/users/paulmck/RCU/
	S: Supported		S: Supported
	T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git		T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
	F: include/linux/srcu*		F: include/linux/srcu.h
	F: kernel/srcu*		F: kernel/rcu/srcu.c

	SMACK SECURITY MODULE		SMACK SECURITY MODULE
	M: Casey Schaufler <casey@schaufler-ca.com>		M: Casey Schaufler <casey@schaufler-ca.com>

kernel/Makefile

+3 −8

Original line number	Original line	Diff line number	Diff line
	@@ -6,9 +6,9 @@ obj-y = fork.o exec_domain.o panic.o \
	cpu.o exit.o itimer.o time.o softirq.o resource.o \		cpu.o exit.o itimer.o time.o softirq.o resource.o \
	sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \		sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
	signal.o sys.o kmod.o workqueue.o pid.o task_work.o \		signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
	rcupdate.o extable.o params.o posix-timers.o \		extable.o params.o posix-timers.o \
	kthread.o wait.o sys_ni.o posix-cpu-timers.o mutex.o \		kthread.o wait.o sys_ni.o posix-cpu-timers.o mutex.o \
	hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \		hrtimer.o rwsem.o nsproxy.o semaphore.o \
	notifier.o ksysfs.o cred.o reboot.o \		notifier.o ksysfs.o cred.o reboot.o \
	async.o range.o groups.o lglock.o smpboot.o		async.o range.o groups.o lglock.o smpboot.o

	@@ -27,6 +27,7 @@ obj-y += power/
	obj-y += printk/		obj-y += printk/
	obj-y += cpu/		obj-y += cpu/
	obj-y += irq/		obj-y += irq/
			obj-y += rcu/

	obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o		obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
	obj-$(CONFIG_FREEZER) += freezer.o		obj-$(CONFIG_FREEZER) += freezer.o
	@@ -81,12 +82,6 @@ obj-$(CONFIG_KGDB) += debug/
	obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o		obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
	obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o		obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
	obj-$(CONFIG_SECCOMP) += seccomp.o		obj-$(CONFIG_SECCOMP) += seccomp.o
	obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
	obj-$(CONFIG_TREE_RCU) += rcutree.o
	obj-$(CONFIG_TREE_PREEMPT_RCU) += rcutree.o
	obj-$(CONFIG_TREE_RCU_TRACE) += rcutree_trace.o
	obj-$(CONFIG_TINY_RCU) += rcutiny.o
	obj-$(CONFIG_TINY_PREEMPT_RCU) += rcutiny.o
	obj-$(CONFIG_RELAY) += relay.o		obj-$(CONFIG_RELAY) += relay.o
	obj-$(CONFIG_SYSCTL) += utsname_sysctl.o		obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
	obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o		obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o

kernel/rcu/Makefile

0 → 100644

+6 −0

Original line number	Original line	Diff line number	Diff line
			obj-y += update.o srcu.o
			obj-$(CONFIG_RCU_TORTURE_TEST) += torture.o
			obj-$(CONFIG_TREE_RCU) += tree.o
			obj-$(CONFIG_TREE_PREEMPT_RCU) += tree.o
			obj-$(CONFIG_TREE_RCU_TRACE) += tree_trace.o
			obj-$(CONFIG_TINY_RCU) += tiny.o