From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932517AbbIXGIJ (ORCPT ); Thu, 24 Sep 2015 02:08:09 -0400 Received: from mga03.intel.com ([134.134.136.65]:29822 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932359AbbIXGIH (ORCPT ); Thu, 24 Sep 2015 02:08:07 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,579,1437462000"; d="scan'208";a="651274523" Message-ID: <56039333.8040208@linux.intel.com> Date: Thu, 24 Sep 2015 14:07:47 +0800 From: "Fu, Zhonghui" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: Jiri Kosina CC: linux-input@vger.kernel.org, "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] hid: enable hid device to suspend/resume asynchronously References: <55D20409.4060801@linux.intel.com> In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2015/9/4 21:10, Jiri Kosina wrote: > On Mon, 17 Aug 2015, Fu, Zhonghui wrote: > >> Enable hid device to suspend/resume asynchronously. This can improve >> system suspend/resume speed. > How well was this tested? > > Power management is notorious for not being really in excellent shape on > many HID devices. > > So I'd like to be careful. I were on leave these days, so sorry for late reply. This can reduce system suspend/resume time about 20ms, from 1030ms to 1010ms on ASUS T100TA machine. Although the improvement is not very significant, but this can let your parent/child device suspend/resume more asynchronously and take advantage of multicore to improve overall system suspend/resume speed. I have resent this patch with updated commit message - "[PATCH v2] hid: enable hid device to suspend/resume asynchronously". Thanks, Zhonghui > > Thanks, >