From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Fu, Zhonghui" Subject: Re: [PATCH] hid: enable hid device to suspend/resume asynchronously Date: Thu, 24 Sep 2015 14:07:47 +0800 Message-ID: <56039333.8040208@linux.intel.com> References: <55D20409.4060801@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: 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 In-Reply-To: Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Jiri Kosina Cc: linux-input@vger.kernel.org, "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, >