函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\net\sch_generic.h Create Date:2022-07-27 07:05:27
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Are all TX queues of the device empty?

函数原型：static inline bool qdisc_all_tx_empty(const struct net_device *dev)

返回类型：bool

参数：

类型参数名称
const struct net_device *dev
739  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
740  以i小于num_tx_queues循环
741  txq等于netdev_get_tx_queue(dev, i)
742  q等于cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().(qdisc)
744  如果非qdisc_is_empty(q)则
745  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
746  返回:false
749  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
750  返回:true