From 7b776af66dc462caa7e839cc5c950a61db1f8551 Mon Sep 17 00:00:00 2001 From: Roger Lu Date: Fri, 1 Jul 2016 11:05:02 +0800 Subject: [PATCH] PM / suspend: show workqueue state in suspend flow If freezable workqueue aborts suspend flow, show workqueue state for debug purpose. Signed-off-by: Roger Lu Acked-by: Tejun Heo Signed-off-by: Rafael J. Wysocki --- kernel/power/process.c | 3 +++ kernel/workqueue.c | 4 ++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/power/process.c b/kernel/power/process.c index df058bed53ce..6eef250a5705 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -89,6 +89,9 @@ static int try_to_freeze_tasks(bool user_only) elapsed_msecs / 1000, elapsed_msecs % 1000, todo - wq_busy, wq_busy); + if (wq_busy) + show_workqueue_state(); + if (!wakeup) { read_lock(&tasklist_lock); for_each_process_thread(g, p) { diff --git a/kernel/workqueue.c b/kernel/workqueue.c index e1c0e996b5ae..619e80ce4a59 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4369,8 +4369,8 @@ static void show_pwq(struct pool_workqueue *pwq) /** * show_workqueue_state - dump workqueue state * - * Called from a sysrq handler and prints out all busy workqueues and - * pools. + * Called from a sysrq handler or try_to_freeze_tasks() and prints out + * all busy workqueues and pools. */ void show_workqueue_state(void) {