From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F21AB347B4; Thu, 29 May 2025 08:54:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748508853; cv=none; b=HqWFYEtDrNIJC9/XtEuDqBBJ1LvXa1BgsbHGVATFNP3pLQFZpVJNyEoSrqM5fYuSkt3juLtFA+8KqWB97yGbnWBxsfQLXantfpeIE2TwYBp5lU3IRWhZI/Lm8KW0+IwGqEWTSM1S2Kf5tIJnlsp3rFUQaD/vh5gFdb2VP8AkjEc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748508853; c=relaxed/simple; bh=WDxv2j8hLFwbgNu+HkSYh8bKjpv1x8FKIC4QbwCa63A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=SQ8v5h7G8a4zg0vznXB5GueCOls4Ew0iLjUUKUMhhq6NUBQoLhaT1frshMvol81yqEMaqO2iVwjcH7G6C7SgnHcjGm51nNTsYeOky81ORNjbu0g5wr5N8zrf8gFu9EQEtAOhpyB13dEjw7L4g3AzV9bh742kakEpzDt432ZsFb8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=VMPLC4n/; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="VMPLC4n/" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=hN1kbETS3aGUaklzGKMpRd++J1JSJtz4mhvGfXe5618=; b=VMPLC4n/9VoWqhO8poGd7oa+c+ SSFvqyJgZ8PZrr4Kupuv/AWaXgpEchVka98Qyj49NCl9n1eHXAVnzhaNUtduyjTVPa8ehHnoKiCPz AVvLjyz+FIfuADWy4yhJkDJuNjwyw0ZO0f4tlycc1Z+8BmX8uOD8qML3nOd4l4OA3F+S6W0TEAU5a xLlR8M7F/M7rsnI0Y7meibEzyoBC38oq43P7OoIYZyDtPm8akpbpBF8UBOkiRqBTCm1N+6D3Wfr9l YVi/HUBhzCcJ/5WC4MAHZ4qu3LMyScCACzh75w4cl+9YrNCyGHFc5dyYmd9ITnuhwJY4yoBtWjMcQ d/QyWvkQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1uKZ1T-000000006sL-1Wf9; Thu, 29 May 2025 08:53:59 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 7227730057C; Thu, 29 May 2025 10:53:58 +0200 (CEST) Date: Thu, 29 May 2025 10:53:58 +0200 From: Peter Zijlstra To: "Rafael J. Wysocki" Cc: "Rafael J. Wysocki" , x86 Maintainers , LKML , Linux PM , Len Brown , Thomas Gleixner , Borislav Petkov , Dave Hansen , Artem Bityutskiy , "Gautham R. Shenoy" , Ingo Molnar , Todd Brandt Subject: Re: [PATCH v1 0/2] x86/smp: Fix power regression introduced by commit 96040f7273e2 Message-ID: <20250529085358.GY24938@noisy.programming.kicks-ass.net> References: <2006806.PYKUYFuaPT@rjwysocki.net> <20250528131759.GA39944@noisy.programming.kicks-ass.net> <20250528133807.GC39944@noisy.programming.kicks-ass.net> <20250528160523.GE39944@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, May 28, 2025 at 07:09:21PM +0200, Rafael J. Wysocki wrote: > And I object to leaving a user-visible regression behind. So we go fix it differently. Why can't we initialize cpuidle before SMP bringup?