函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rcu\tree.c Create Date:2022-07-27 11:26:03
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：_idle_exit - inform RCU that current CPU is leaving idle* Exit idle mode, in other words, -enter- the mode in which RCU* read-side critical sections can occur.* If you add or remove a call to rcu_idle_exit(), be sure to test with* CONFIG_RCU_EQS_DEBUG=y.

函数原型：void rcu_idle_exit(void)

返回类型：void

参数：无

768  local_irq_save(flags)
769  Exit an RCU extended quiescent state, which can be either the* idle loop or adaptive-tickless usermode execution.* We crowbar the ->dynticks_nmi_nesting field to DYNTICK_IRQ_NONIDLE to* allow for the possibility of usermode upcalls messing up our count of
770  local_irq_restore(flags)
调用者
名称描述
cpu_idle_poll
cpuidle_idle_callpuidle_idle_call - the main idle function* NOTE: no locks or semaphores should be used here* On archs that support TIF_POLLING_NRFLAG, is called with polling* set, and it returns with polling set. If it ever stops polling, it* must clear the polling bit.