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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 488DDC47080 for ; Mon, 31 May 2021 17:00:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2252661042 for ; Mon, 31 May 2021 17:00:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232523AbhEaRCQ (ORCPT ); Mon, 31 May 2021 13:02:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233525AbhEaPly (ORCPT ); Mon, 31 May 2021 11:41:54 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72051C0611B7 for ; Mon, 31 May 2021 07:29:23 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1622471360; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iS72Lyc7K+Koe5Hwldg+FNigquGbqKC8+JuTLMLpsk8=; b=kr8TdLoWdSe1LsFejn8coqGEFv2CK98bMypXrjHUtOcK8XxDVTXyTP/6ILnRvNI/sFpJ2T skSem6rYERm//3EUFxZ+Yt6RVFY3qnolfLdBQxt4JztZ1JR0KpsE9mB1O684tpzoCOpnxo orRcSbx7iocfCo4gUH0WPscZRHd8wNi8wyrgp2X53fXOj177af7Fka2Tamr/fH40zZDvS+ ffUI1aQVohJwJvNSxlU1bGM2rheMq7gNgDYup2y1nXdQCp5sI3kWMkTPhRlzr2zSnFOJn8 yL0ZEO/LoUGYnihq37pc3iYu05zsVPRWdG8jOcuD/cBhb9Gq2nn2vL/dTJ2zXg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1622471360; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iS72Lyc7K+Koe5Hwldg+FNigquGbqKC8+JuTLMLpsk8=; b=/oq0SpQ0lR3JGynw2ALXuql8FQREM6P3BWfK9ewYh8fiFGN+txZUgxJxEu7kxS8OHGUS31 6iyQi/fDy6GwKNAw== To: Will Deacon , Xin Hao 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 Subject: Re: [PATCH v2 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper In-Reply-To: <20210527115646.GD22019@willie-the-truck> References: <20210524221818.15850-3-will@kernel.org> <20210527082219.GA21311@willie-the-truck> <20210527115646.GD22019@willie-the-truck> Date: Mon, 31 May 2021 16:29:20 +0200 Message-ID: <87k0nf3rjz.ffs@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 27 2021 at 12:56, Will Deacon wrote: > On Thu, May 27, 2021 at 07:35:03PM +0800, Xin Hao wrote: >>=20 >> =E5=9C=A8 2021/5/27 =E4=B8=8B=E5=8D=884:22, Will Deacon =E5=86=99=E9=81= =93: >> > On Thu, May 27, 2021 at 03:23:06PM +0800, Xin Hao wrote: >> > > =C2=A0=C2=A0=C2=A0=C2=A0 I=C2=A0 had backport you=C2=A0 tick/broadc= ast: Prefer per-cpu relatives patches, >> > >=20 >> > > but i did not get the true result,=C2=A0 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_PER= CPU >>=20 >> Yes, you are right, but i want to know why the timer do not support=C2=A0 >> CLOCK_EVT_FEAT_PERCPU. > > I defer to Thomas on this one. How should I know what kind of timers this hardware has? Thanks, tglx