From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751735AbcF3DUY (ORCPT ); Wed, 29 Jun 2016 23:20:24 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:32955 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751550AbcF3DUV (ORCPT ); Wed, 29 Jun 2016 23:20:21 -0400 From: Roger Lu To: "Rafael J . Wysocki" , Len Brown , Pavel Machek , Tejun Heo CC: , , Sascha Hauer , Lai Jiangshan , Matthias Brugger , , , , Roger Lu Subject: [PATCH] PM / suspend: show workqueue state in suspend flow Date: Thu, 30 Jun 2016 11:17:46 +0800 Message-ID: <1467256666-27808-1-git-send-email-roger.lu@mediatek.com> X-Mailer: git-send-email 2.6.4 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If freezable workqueue aborts suspend flow, show workqueue state for debug purpose. Signed-off-by: Roger Lu --- kernel/power/process.c | 3 +++ kernel/workqueue.c | 7 +++++-- 2 files changed, 8 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..c945617 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) { @@ -4396,6 +4396,9 @@ void show_workqueue_state(void) if (idle) continue; + if (wq->flags & WQ_FREEZABLE) + pr_info("freezable "); + pr_info("workqueue %s: flags=0x%x\n", wq->name, wq->flags); for_each_pwq(pwq, wq) { -- 2.6.4