From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932225AbVLAN3c (ORCPT ); Thu, 1 Dec 2005 08:29:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932231AbVLAN3c (ORCPT ); Thu, 1 Dec 2005 08:29:32 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:46210 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S932225AbVLAN3b (ORCPT ); Thu, 1 Dec 2005 08:29:31 -0500 Subject: Re: [PATCH 0/4] linux-2.6-block: deactivating pagecache for benchmarks From: Arjan van de Ven To: Dirk Henning Gerdes Cc: Jens Axboe , LKML In-Reply-To: <1133443051.6110.32.camel@noti> References: <1133443051.6110.32.camel@noti> Content-Type: text/plain Date: Thu, 01 Dec 2005 14:29:25 +0100 Message-Id: <1133443765.2853.39.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: 1.8 (+) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [213.93.14.173 listed in dnsbl.sorbs.net] 1.7 RCVD_IN_NJABL_DUL RBL: NJABL: dialup sender did non-local SMTP [213.93.14.173 listed in combined.njabl.org] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2005-12-01 at 14:17 +0100, Dirk Henning Gerdes wrote: > Hi Jens! > > For doing benchmarks on the I/O-Schedulers, I thought it would be very > useful to disable the pagecache. for benchmarks this is not enough though, you also need to clean the inode and dentry caches, as well as any filesystem specific caches (might be buffer cache)..... at which point it's probably nicer to just fake a limited umount since that has to do all of that anyway