From: lily <floridsleeves@xxxxxxxxx>
Check the return value of task_function_call(), which could be error
code when the execution fails. We log this on info level.
Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx>
---
kernel/events/core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2621fd24ad26..3848631b009c 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -13520,7 +13520,10 @@ static void perf_cgroup_attach(struct cgroup_taskset *tset)
struct cgroup_subsys_state *css;
cgroup_taskset_for_each(task, css, tset)
- task_function_call(task, __perf_cgroup_move, task);
+ if (!task_function_call(task, __perf_cgroup_move, task)) {
+ printk(KERN_INFO "perf: this process isn't running!\n");
+ continue;
+ }
}
struct cgroup_subsys perf_event_cgrp_subsys = {
--
2.25.1
