Michal Koutný ab3e3b23d8 cgroup: Iterate tasks that did not finish do_exit() ... commit 9c974c7724 upstream. PF_EXITING is set earlier than actual removal from css_set when a task is exitting. This can confuse cgroup.procs readers who see no PF_EXITING tasks, however, rmdir is checking against css_set membership so it can transitionally fail with EBUSY. Fix this by listing tasks that weren't unlinked from css_set active lists. It may happen that other users of the task iterator (without CSS_TASK_ITER_PROCS) spot a PF_EXITING task before cgroup_exit(). This is equal to the state before commit c03cd7738a ("cgroup: Include dying leaders with live threads in PROCS iterations") but it may be reviewed later. Reported-by: Suren Baghdasaryan <surenb@google.com> Fixes: c03cd7738a ("cgroup: Include dying leaders with live threads in PROCS iterations") Signed-off-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-03-18 07:14:19 +01:00
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cgroup-internal.h
cgroup-v1.c
cgroup.c	cgroup: Iterate tasks that did not finish do_exit()	2020-03-18 07:14:19 +01:00
cpuset.c
debug.c
freezer.c
Makefile
namespace.c
pids.c	cgroup: pids: use atomic64_t for pids->limit	2019-12-17 20:34:56 +01:00
rdma.c
rstat.c