Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932089Ab2HFObM (ORCPT ); Mon, 6 Aug 2012 10:31:12 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:49764 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756399Ab2HFObL (ORCPT ); Mon, 6 Aug 2012 10:31:11 -0400 MIME-Version: 1.0 X-Originating-IP: [121.7.238.199] Date: Mon, 6 Aug 2012 22:31:09 +0800 Message-ID: Subject: rts5139 polling overhead... From: Daniel J Blueman To: edwin_rong Cc: Linux Kernel , wei_wang@realsil.com.cn Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 833 Lines: 23 Hi Edwin, The Realsil/Realtek rts5139 card reader driver polls it's hardware at 20Hz and has racked up 25 minutes of processor time over a few days on this Sandy Bridge media centre box, without any cards inserted. This is more than the sum of all the other processes (including X): $ ps -ef | grep rts5139 root 691 2 0 Aug03 ? 00:00:36 [rts5139-control] root 693 2 0 Aug03 ? 00:25:36 [rts5139-polling] The kernel is stock 3.5.0 without debug; would it help if I log a bug report or eg collect further detail? Thanks, Daniel -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/