From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761906Ab2COMqe (ORCPT ); Thu, 15 Mar 2012 08:46:34 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:34292 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760121Ab2COMqd (ORCPT ); Thu, 15 Mar 2012 08:46:33 -0400 Date: Thu, 15 Mar 2012 12:46:31 +0000 From: Mark Brown To: Simon Horman Cc: Liam Girdwood , linux-kernel@vger.kernel.org Subject: Re: [PATCH] regulator: notify sysfs when voltage is set Message-ID: <20120315124631.GJ3138@opensource.wolfsonmicro.com> References: <1331813073-714-1-git-send-email-horms@verge.net.au> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="MFZs98Tklfu0WsCO" Content-Disposition: inline In-Reply-To: <1331813073-714-1-git-send-email-horms@verge.net.au> X-Cookie: Are you a turtle? User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --MFZs98Tklfu0WsCO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Mar 15, 2012 at 09:04:33PM +0900, Simon Horman wrote: > This allows libudev to be used to monitor voltage changes and thus allows > user-space code to avoid polling the sysfs entry for changes. I notice that we don't generate similar events for cpufreq... what are the performance implications from firing off udev (which isn't free) every time we scale the CPU frequency? It feels like this might be disruptive, especially with a governor like ondemand which responds to system load. --MFZs98Tklfu0WsCO Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJPYeShAAoJEBus8iNuMP3dvasP/i0PqANwn4eiUz88yCQZc46m tSmcH7j4U+3KYJNK5fpl/GS5Imz/nnG0NdLsyNZ2ATlB+Y1bcvIweTGHMAkQWBYw LLobuOD8Kvbf7E1ZTed8dtqmSfKpGmEMdRjiyANvMzyM1Oy5Qp4UcRIhrwQknTZn 25Frv3/4WV6Vneu3PXoDI0WeYMMnxZKOZR8wgA4mZHfaMsWSzKuufZk568emmDO9 TyiHSLYXJlGHR559/xTW1e989x8MVGR3A210N2jwzeDeHk/Y72ajFNhPHX279vpS MV1rZofMy0GD1rRCnHNltx+IJH1AnjbtDYL3xqhjO/ElFvZTpJCELC7QxzWBSYvr 2G1L/UXpdBKF/90dBvXlgVrurTMfZ3Cl+xH4Knb6lqo3EqjlWiQdPTDItPdiy+nh A47fJ4KcC5u8YnQfqqNUzlozw77nz6BIaw2X7CU8ERX/yVodJw2I6h/57e7p8giY iN4Uplb1ijteONY6arSWvk71kShgOTy7tiyZN/iE6VnkvRPc9kpuqc60vgJFkxh6 f//aVOJ5FpEv7dkbtbhSGf1Z+rX26Gm152VuU6TT0sY+2ddVhDqwi+3IbpCQYkvT 6k2M6JrO+NHSKh27/VPcI/HHG7GhEi7XjD4VlI+TjaAOY3Y+O77ZQ+cRalZZ/Zus bHMpZ5lGKppfnKEmhpm6 =rkmv -----END PGP SIGNATURE----- --MFZs98Tklfu0WsCO--