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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FAKE_REPLY_C,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 A957BCA9EC0 for ; Mon, 28 Oct 2019 16:47:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C102208C0 for ; Mon, 28 Oct 2019 16:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572281276; bh=U/VdLABaNAO/Q6W5hNM4pvgx9a5/yM5EU+zAcA6EyBQ=; h=Date:From:To:Cc:Subject:In-Reply-To:List-ID:From; b=CXFjITRFOQAjTZegTT0Jf//05TcpJzBZ8TOJasx/xrZuPm6x3tWaoxOBcH7kHk6/m eyy+KlLSctsiaJrNEExzEGK4KYc/YEyCHaYUqmU0/hOizfCVVAZA5FjiD81ci5mUyW 7PKUSgAB4MkrovZr0aaAkDuPUCSSUm1pWDN4gPCc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403864AbfJ1Qr4 (ORCPT ); Mon, 28 Oct 2019 12:47:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:51308 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733000AbfJ1Qrz (ORCPT ); Mon, 28 Oct 2019 12:47:55 -0400 Received: from localhost (unknown [69.71.4.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0E4CF208C0; Mon, 28 Oct 2019 16:47:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572281275; bh=U/VdLABaNAO/Q6W5hNM4pvgx9a5/yM5EU+zAcA6EyBQ=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=EFHPD7dgTB2RKvFrVtaTx2Aukje9l1QV0Xkt7+xDogjjB0C1mgMfjMqLOU1115Fhm RAIjENr4zZMg7fpr3eMFZv6uBVJGF8RrSAdM+fmQMn1V+pWw1J4FiX28GX7nVHCRsz uhwApeXnDHxVQjNN9SWml5mW/3T3xE3rTRD2Ccgg= Date: Mon, 28 Oct 2019 11:47:53 -0500 From: Bjorn Helgaas To: Heiner Kallweit Cc: "linux-pci@vger.kernel.org" Subject: Re: Drop Kconfig option PCIEASPM? Message-ID: <20191028164753.GA103542@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1f784101-fe7a-becf-d855-ddc6d03a3f92@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Fri, Oct 25, 2019 at 11:42:06PM +0200, Heiner Kallweit wrote: > I wonder whether anybody actually wants to disable ASPM support. > In an old Kconfig commit message is mentioned that it may help > to reduce kernel size of embedded systems. However I would > think that on embedded systems ASPM is quite useful as it > saves significant power and may result in a lower system > temperature therefore. > W/o ASPM support we have to live with devices coming up > in whatever mode boot loader or firmware configure. What would be the advantage of dropping CONFIG_PCIEASPM? I don't think it really costs us much to keep it. I do agree most systems probably want it.