Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758174AbYBPQPh (ORCPT ); Sat, 16 Feb 2008 11:15:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753623AbYBPQPa (ORCPT ); Sat, 16 Feb 2008 11:15:30 -0500 Received: from minas.ics.muni.cz ([147.251.4.40]:40288 "EHLO minas.ics.muni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753118AbYBPQP3 (ORCPT ); Sat, 16 Feb 2008 11:15:29 -0500 Date: Sat, 16 Feb 2008 17:15:26 +0100 From: Lukas Hejtmanek To: Paulo Marques Cc: linux-kernel@vger.kernel.org Subject: Re: Disk schedulers Message-ID: <20080216161526.GH4269@ics.muni.cz> References: <20080214162104.GA5347@ics.muni.cz> <47B5CAE4.1000905@grupopie.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <47B5CAE4.1000905@grupopie.com> X-echelon: NSA, CIA, CI5, MI5, FBI, KGB, BIS, Plutonium, Bin Laden, bomb User-Agent: Mutt/1.5.17+20080114 (2008-01-14) X-Muni-Spam-TestIP: 81.31.45.161 X-Muni-Envelope-From: xhejtman@anubis.fi.muni.cz X-Muni-Virus-Test: Clean X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (minas.ics.muni.cz [147.251.4.35]); Sat, 16 Feb 2008 17:15:26 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 941 Lines: 19 On Fri, Feb 15, 2008 at 05:24:52PM +0000, Paulo Marques wrote: > If you want to take advantage of all that memory to buffer disk writes, > so that the reads can proceed better, you might want to tweak your > /proc/sys/vm/dirty_ratio amd /proc/sys/vm/dirty_background_ratio to more > appropriate values. (maybe also dirty_writeback_centisecs and > dirty_expire_centisecs) I don't feel like to have my whole memory eaten by a single file which is not to be read again and thus it is pretty useless. Instead, I would like to see slowdown of scp so that other processes can also access disk. Why is this possible with kernel process scheduler and not with IO scheduler? -- Luk?? Hejtm?nek -- 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/