From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Lu Subject: [PATCH v2] PM / suspend: show workqueue state in suspend flow Date: Fri, 1 Jul 2016 11:05:02 +0800 Message-ID: <1467342302-16129-1-git-send-email-roger.lu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: "Rafael J . Wysocki" , Pavel Machek , Len Brown , Tejun Heo Cc: srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Roger Lu , Lai Jiangshan , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Sascha Hauer , Matthias Brugger , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-pm@vger.kernel.org If freezable workqueue aborts suspend flow, show workqueue state for debug purpose. Signed-off-by: Roger Lu --- Changes in v2: - remove prints in show_workqueue_state(). --- 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 df058be..6eef250 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 e1c0e99..619e80c 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) { -- 2.6.4