函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\cgroup\cpuset.c Create Date:2022-07-27 12:18:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：pdate_sibling_cpumasks - Update siblings cpumasks*@parent: Parent cpuset*@cs: Current cpuset*@tmp: Temp variables

函数原型：static void update_sibling_cpumasks(struct cpuset *parent, struct cpuset *cs, struct tmpmasks *tmp)

返回类型：void

参数：

类型参数名称
struct cpuset *parent
struct cpuset *cs
struct tmpmasks *tmp
1456  _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
1457  cpuset_for_each_child - traverse online children of a cpuset*@child_cs: loop cursor pointing to the current child*@pos_css: used for iteration*@parent_cs: target cpuset to walk children of* Walk @child_cs through the online children of @parent_cs(sibling, pos_css, parent)
1458  如果sibling恒等于cs则继续下一循环
1460  如果非* Default hierarchy only: * use_parent_ecpus - set if using parent's effective_cpus * child_ecpus_count - # of children with use_parent_ecpus set则继续下一循环
1463  pdate_cpumasks_hier - Update effective cpumasks and tasks in the subtree*@cs: the cpuset to consider*@tmp: temp variables for calculating effective_cpus & partition setup* When congifured cpumask is changed, the effective cpumasks of this cpuset
1465  _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()
调用者
名称描述
update_cpumaskpdate_cpumask - update the cpus_allowed mask of a cpuset and all tasks in it*@cs: the cpuset to consider*@trialcs: trial cpuset*@buf: buffer of cpu numbers written to this cpuset
update_prstatepdate_prstate - update partititon_root_state* Call with cpuset_mutex held.