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| author | Tejun Heo <tj@kernel.org> | 2019-05-31 20:38:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-09 18:52:34 +0300 |
| commit | 4340d175b89896d069c1e875f5b98c80a408f680 (patch) | |
| tree | 6bf38ad823b9b8218a9605cd6df220b97d387ae4 /include | |
| parent | 370b9e6399da09fe10005fe455878b356de7b85f (diff) | |
| download | linux-4340d175b89896d069c1e875f5b98c80a408f680.tar.xz | |
cgroup: Include dying leaders with live threads in PROCS iterations
commit c03cd7738a83b13739f00546166969342c8ff014 upstream.
CSS_TASK_ITER_PROCS currently iterates live group leaders; however,
this means that a process with dying leader and live threads will be
skipped. IOW, cgroup.procs might be empty while cgroup.threads isn't,
which is confusing to say the least.
Fix it by making cset track dying tasks and include dying leaders with
live threads in PROCS iteration.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-tested-by: Topi Miettinen <toiwoton@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cgroup-defs.h | 1 | ||||
| -rw-r--r-- | include/linux/cgroup.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index a6090154b2ab..a01ebb630abc 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -207,6 +207,7 @@ struct css_set { */ struct list_head tasks; struct list_head mg_tasks; + struct list_head dying_tasks; /* all css_task_iters currently walking this cset */ struct list_head task_iters; diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index f85e65b248b7..b4854b48a4f3 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -60,6 +60,7 @@ struct css_task_iter { struct list_head *task_pos; struct list_head *tasks_head; struct list_head *mg_tasks_head; + struct list_head *dying_tasks_head; struct css_set *cur_cset; struct css_set *cur_dcset; |