Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753271AbaATIxp (ORCPT ); Mon, 20 Jan 2014 03:53:45 -0500 Received: from mga09.intel.com ([134.134.136.24]:40905 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753153AbaATIxl (ORCPT ); Mon, 20 Jan 2014 03:53:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,689,1384329600"; d="scan'208";a="461529679" From: "Liu, Chuansheng" To: rjw@rjwysocki.net, gregkh@linuxfoundation.org, pavel@ucw.cz, len.brown@intel.com Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, chuansheng.liu@intel.com, zhuangzhi.li@intel.com Subject: [PATCH 3/5] PM: Enabling the asyncronous threads for resume_early Date: Mon, 20 Jan 2014 16:44:37 +0800 Message-Id: <1390207479-26064-4-git-send-email-chuansheng.liu@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1390207479-26064-1-git-send-email-chuansheng.liu@intel.com> References: <1390207479-26064-1-git-send-email-chuansheng.liu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liu, Chuansheng" Just like commit 5af84b82701a and 97df8c12995, using the asynchronous threads can improve the overall resume_early time significantly. This patch is for resume_early phase. Signed-off-by: Liu, Chuansheng --- drivers/base/power/main.c | 48 +++++++++++++++++++++++++++++++++++---------- 1 file changed, 38 insertions(+), 10 deletions(-) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index c8a00fc..1bad6bd 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -619,35 +619,63 @@ static int device_resume_early(struct device *dev, pm_message_t state) return error; } +static void async_resume_early(void *data, async_cookie_t cookie) +{ + struct device *dev = (struct device *)data; + int error; + + error = device_resume_early(dev, pm_transition); + if (error) + pm_dev_err(dev, pm_transition, " async", error); + put_device(dev); +} + /** * dpm_resume_early - Execute "early resume" callbacks for all devices. * @state: PM transition of the system being carried out. */ static void dpm_resume_early(pm_message_t state) { + struct device *dev; ktime_t starttime = ktime_get(); mutex_lock(&dpm_list_mtx); - while (!list_empty(&dpm_late_early_list)) { - struct device *dev = to_device(dpm_late_early_list.next); - int error; + pm_transition = state; + /* + * Advanced the async threads upfront, + * in case the starting of async threads is + * delayed by non-async resuming devices. + */ + list_for_each_entry(dev, &dpm_late_early_list, power.entry) { + if (is_async(dev)) { + get_device(dev); + async_schedule(async_resume_early, dev); + } + } + + while (!list_empty(&dpm_late_early_list)) { + dev = to_device(dpm_late_early_list.next); get_device(dev); list_move_tail(&dev->power.entry, &dpm_suspended_list); mutex_unlock(&dpm_list_mtx); - error = device_resume_early(dev, state); - if (error) { - suspend_stats.failed_resume_early++; - dpm_save_failed_step(SUSPEND_RESUME_EARLY); - dpm_save_failed_dev(dev_name(dev)); - pm_dev_err(dev, state, " early", error); - } + if (!is_async(dev)) { + int error; + error = device_resume_early(dev, state); + if (error) { + suspend_stats.failed_resume_early++; + dpm_save_failed_step(SUSPEND_RESUME_EARLY); + dpm_save_failed_dev(dev_name(dev)); + pm_dev_err(dev, state, " early", error); + } + } mutex_lock(&dpm_list_mtx); put_device(dev); } mutex_unlock(&dpm_list_mtx); + async_synchronize_full(); dpm_show_time(starttime, state, "early"); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/