Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rcu\tree.c Create Date:2022-07-28 10:26:20
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:Body of kthread that handles grace periods.

Proto:static int __noreturn rcu_gp_kthread(void *unused)

Type:int

Parameter:

TypeParameterName
void *unused
1797  rcu_bind_gp_kthread()
1798  cycle
1801  cycle
1802  trace_rcu_grace_period(Name of structure. , READ_ONCE(Grace-period sequence #. ), Strings used in tracepoints need to be exported via the* tracing system such that tools like perf and trace-cmd can* translate the string address pointers to actual text.("reqwait"))
1805  GP kthread sleep state. = Wait for grace-period start.
1806  swait_event_idle_exclusive - wait without system load contribution*@wq: the waitqueue to wait on*@condition: a C expression for the event to wait for* The process is put to sleep (TASK_IDLE) until the @condition evaluates to* true(Where GP task waits. , READ_ONCE(Commands for GP task. ) & Need grace-period initialization. )
1809  GP kthread sleep state. = Wait done for grace-period start.
1811  If Initialize a new grace period. Return false if no grace period required. Then Break
1813  cond_resched_tasks_rcu_qs - Report potential quiescent states to RCU* This macro resembles cond_resched(), except that it is defined to* report potential quiescent states to RCU-tasks even if the cond_resched()()
1814  WRITE_ONCE(Time of last GP kthread , jiffies)
1815  WARN_ON(signal_pending(current process))
1816  trace_rcu_grace_period(Name of structure. , READ_ONCE(Grace-period sequence #. ), Strings used in tracepoints need to be exported via the* tracing system such that tools like perf and trace-cmd can* translate the string address pointers to actual text.("reqwaitsig"))
1822  Loop doing repeated quiescent-state forcing until the grace period ends.
1825  GP kthread sleep state. = Grace-period cleanup started.
1826  Clean up after the old grace period.
1827  GP kthread sleep state. = Grace-period cleanup complete.