hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVN0
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Export cgroup.kill feature from cgroupv2 to cgroupv1. Therefore, user can kill all process in one cgroup and its subcgroups instead of kill them one by one.
Signed-off-by: Lu Jialin lujialin4@huawei.com --- init/Kconfig | 5 +++++ kernel/cgroup/cgroup-internal.h | 3 +++ kernel/cgroup/cgroup-v1.c | 7 +++++++ kernel/cgroup/cgroup.c | 4 ++-- 4 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/init/Kconfig b/init/Kconfig index 6d35728b94b2..f37422327249 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1175,6 +1175,11 @@ config SOCK_CGROUP_DATA bool default n
+config CGROUP_V1_KILL + bool "Kill All Tasks In Cgroup V1" + default n + depends on CGROUPS + endif # CGROUPS
menuconfig NAMESPACES diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index c56071f150f2..d5a197d4b0ec 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -264,6 +264,9 @@ int cgroup_show_path(struct seq_file *sf, struct kernfs_node *kf_node, int __cgroup_task_count(const struct cgroup *cgrp); int cgroup_task_count(const struct cgroup *cgrp);
+ssize_t cgroup_kill_write(struct kernfs_open_file *of, char *buf, size_t nbytes, + loff_t off); + /* * rstat.c */ diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c index 76db6c67e39a..134a15e1d83a 100644 --- a/kernel/cgroup/cgroup-v1.c +++ b/kernel/cgroup/cgroup-v1.c @@ -660,6 +660,13 @@ struct cftype cgroup1_base_files[] = { .write = cgroup_release_agent_write, .max_write_len = PATH_MAX - 1, }, +#ifdef CONFIG_CGROUP_V1_KILL + { + .name = "cgroup.kill", + .flags = CFTYPE_NOT_ON_ROOT, + .write = cgroup_kill_write, + }, +#endif { } /* terminate */ };
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 518725b57200..8db5e7eb242b 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -3965,8 +3965,8 @@ static void cgroup_kill(struct cgroup *cgrp) __cgroup_kill(dsct); }
-static ssize_t cgroup_kill_write(struct kernfs_open_file *of, char *buf, - size_t nbytes, loff_t off) +ssize_t cgroup_kill_write(struct kernfs_open_file *of, char *buf, size_t nbytes, + loff_t off) { ssize_t ret = 0; int kill;