一、相关DEBUG接口
1. cat /proc/mounts | grep cgroup 可以查看每个子系统挂载位置等信息
# cat /proc/mounts | grep cgroup none /dev/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0 none /sys/fs/cgroup cgroup2 rw,nosuid,nodev,noexec,relatime,memory_recursiveprot 0 0 none /dev/cpuctl cgroup rw,nosuid,nodev,noexec,relatime,cpu 0 0 none /dev/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent 0 0 none /dev/memcg cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0 none /dev/freezer cgroup rw,relatime,freezer 0 0
2. cgroup_debug 启动参数
Group的debug接口在 CONFIG_CGROUP_DEBUG 使能后打开，struct cgroup_subsys debug_cgrp_subsys 是个 __setup("cgroup_debug", enable_cgroup_debug);
3. cat /proc/pid/cgroup
# cat /proc/4128/cgroup 5:freezer:/ 4:memory:/ 3:cpuset:/restricted 2:cpu:/foreground 1:blkio:/ 0::/uid_10179/pid_4128
前面的编号数字0 1 2 3 4 5 来自于每个 group 的 hierarchy_id：
cat /proc/<pid>/cgroup
proc_cgroup_show //proc/fs/base.c struct pid_entry tgid_base_stuff[]
list_for_each_entry((root), &cgroup_roots, root_list) {
seq_printf(m, "%d:", root->hierarchy_id);
}
标签：relatime,none,rw,Cgroup,笔记,cgroup,DEBUG,proc,nodev From： https://www.cnblogs.com/hellokitty2/p/17183144.html