函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\cgroup\cgroup.c Create Date:2022-07-27 12:10:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：group_migrate - migrate a process or task to a cgroup*@leader: the leader of the process or the task to migrate*@threadgroup: whether @leader points to the whole process or a single task*@mgctx: migration context

函数原型：int cgroup_migrate(struct task_struct *leader, bool threadgroup, struct cgroup_mgctx *mgctx)

返回类型：int

参数：

类型参数名称
struct task_struct *leader
boolthreadgroup
struct cgroup_mgctx *mgctx
2695  spin_lock_irq( & css_set_lock)
2696  _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
2697  task等于leader
2698  循环
2699  group_migrate_add_task - add a migration target task to a migration context*@task: target task*@mgctx: target migration context* Add @task, which is a migration target, to @mgctx->tset. This function* becomes noop if @task doesn't need to be migrated
2700  如果非threadgroup则退出
2703  _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()
2704  spin_unlock_irq( & css_set_lock)
2706  返回:group_taskset_migrate - migrate a taskset*@mgctx: migration context* Migrate tasks in @mgctx as setup by migration preparation functions.* This function fails iff one of the ->can_attach callbacks fails and
调用者
名称描述
cgroup_attach_taskgroup_attach_task - attach a task or a whole threadgroup to a cgroup*@dst_cgrp: the cgroup to attach to*@leader: the task or the leader of the threadgroup to be attached*@threadgroup: attach the whole threadgroup?
cgroup_transfer_tasksgroup_trasnsfer_tasks - move tasks from one cgroup to another*@to: cgroup to which the tasks will be moved*@from: cgroup in which the tasks currently reside* Locking rules between cgroup_post_fork() and the migration path* guarantee that, if a task is