From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BECDC4708C for ; Thu, 27 May 2021 11:35:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D82B613D1 for ; Thu, 27 May 2021 11:35:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233771AbhE0Lgl (ORCPT ); Thu, 27 May 2021 07:36:41 -0400 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:39652 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232324AbhE0Lgj (ORCPT ); Thu, 27 May 2021 07:36:39 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=xhao@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0UaGrBy7_1622115303; Received: from B-X3VXMD6M-2058.local(mailfrom:xhao@linux.alibaba.com fp:SMTPD_---0UaGrBy7_1622115303) by smtp.aliyun-inc.com(127.0.0.1); Thu, 27 May 2021 19:35:04 +0800 From: Xin Hao Reply-To: xhao@linux.alibaba.com Subject: Re: [PATCH v2 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper To: Will Deacon Cc: fweisbec@gmail.com, john.stultz@linaro.org, kernel-team@android.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, lorenzo@google.com, maz@kernel.org, mika.penttila@nextfour.com, sboyd@kernel.org, tglx@linutronix.de References: <20210524221818.15850-3-will@kernel.org> <20210527082219.GA21311@willie-the-truck> Message-ID: Date: Thu, 27 May 2021 19:35:03 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: <20210527082219.GA21311@willie-the-truck> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 在 2021/5/27 下午4:22, Will Deacon 写道: > On Thu, May 27, 2021 at 03:23:06PM +0800, Xin Hao wrote: >>      I  had backport you  tick/broadcast: Prefer per-cpu relatives patches, >> >> but i did not get the true result,  the Wakeup Devices are all null, why? > Probably because you don't have any suitable per-cpu timers to act as a > wakeup. Do you have a per-cpu timer registered with CLOCK_EVT_FEAT_PERCPU Yes, you are right, but i want to know why the timer do not support  CLOCK_EVT_FEAT_PERCPU. > and CLOCK_EVT_FEAT_ONESHOT but not CLOCK_EVT_FEAT_C3STOP? > > Will -- Best Regards! Xin Hao