forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

pidns: Wait in zap_pid_ns_processes until pid_ns->nr_hashed == 1

Browse source 
Looking at pid_ns->nr_hashed is a bit simpler and it works for
disjoint process trees that an unshare or a join of a pid_namespace
may create.

Acked-by: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-08-01 15:03:42 -07:00
parent 5e1182deb8
commit af4b8a83ad
3 changed files with 17 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

12
kernel/exit.c
View file

@ -72,18 +72,6 @@ static void __unhash_process(struct task_struct *p, bool group_dead)
list_del_rcu(&p->tasks);
list_del_init(&p->sibling);
__this_cpu_dec(process_counts);
/*
* If we are the last child process in a pid namespace to be
* reaped, notify the reaper sleeping zap_pid_ns_processes().
*/
if (IS_ENABLED(CONFIG_PID_NS)) {
struct task_struct *parent = p->real_parent;
if ((task_active_pid_ns(parent)->child_reaper == parent) &&
list_empty(&parent->children) &&
(parent->flags & PF_EXITING))
wake_up_process(parent);
}
}
list_del_rcu(&p->thread_group);
}