From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756713AbZEPOZZ (ORCPT ); Sat, 16 May 2009 10:25:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754008AbZEPOZK (ORCPT ); Sat, 16 May 2009 10:25:10 -0400 Received: from wf-out-1314.google.com ([209.85.200.173]:59363 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753173AbZEPOZI (ORCPT ); Sat, 16 May 2009 10:25:08 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=icY9FqIpKwO6MELqcLApcogg/B9+Pr8FFJp2k+4Go4Ow6sgWaIeW76G90sNh/XDRJf SULgKku+A6axVbqmGCLGUZtt5XG4lKr75449RDngN+3DWWOzvbo4631thbTPipSs2HvW ANT2XDTt4lDrtAYBSIR2RZExQijSJVIWlfQ9c= MIME-Version: 1.0 In-Reply-To: <2c0942db0905151102y4f144437xa02632effccda72c@mail.gmail.com> References: <93655eb70905151007v5f9bb34aj34be4b65ffeb02a4@mail.gmail.com> <2c0942db0905151102y4f144437xa02632effccda72c@mail.gmail.com> Date: Sat, 16 May 2009 19:55:09 +0530 Message-ID: <93655eb70905160725u2ae9e11sec4abe9f95be18ed@mail.gmail.com> Subject: Re: unresponsiveness on linux desktop during file copy From: Satish Eerpini To: Ray Lee Cc: Rik van Riel , linux-kernel Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Which kernel version? If it's something recent, your programs may be > getting swapped out due to a flaw in the latest kernels, where it > accidentally prefers caching file data over mapped pages. If that's > the case, Rik (cc:d) is working on patches to address the issue, and > may appreciate another tester. well I went through http://kerneltrap.org/node/3000 on kerneltrap , which I think is what you are pointing out here. Well I checked the "swappiness" parameter on my system and it is set to 60 , and bravely I changed it to '0', while the system appeared to have become a lot more responsive, I see no difference in the statistics: Linux 2.6.29.1 (satish) 05/16/2009 07:49:43 PM CPU %user %nice %system %iowait %steal %idle 07:49:46 PM all 7.30 0.00 8.25 40.00 0.00 44.44 07:49:49 PM all 7.21 0.00 9.40 36.36 0.00 47.02 07:49:52 PM all 8.62 0.00 9.40 34.80 0.00 47.18 07:49:55 PM all 7.26 0.00 8.36 37.07 0.00 47.32 07:49:58 PM all 7.89 0.00 9.15 36.59 0.00 46.37 Average: all 7.66 0.00 8.92 36.96 0.00 46.47 so there is still a huge IOWAIT , .. Cheers Satish -- http://satish.playdrupal.com