Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 13 Nov 2000 17:24:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 13 Nov 2000 17:24:15 -0500 Received: from deliverator.sgi.com ([204.94.214.10]:15880 "EHLO deliverator.sgi.com") by vger.kernel.org with ESMTP id ; Mon, 13 Nov 2000 17:24:05 -0500 From: "LA Walsh" To: "lkml" Subject: IDE0 /dev/hda performance hit in 2217 on my HW Date: Mon, 13 Nov 2000 13:52:37 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I skimmed over the archives and didn't find a mention of this. I thought I'd noticed this when I first installed 2217, but I was too busy to verify it at the time. Simple case: Under 2216, I can do a 'badblocks /dev/hda1 XXXXX'. Vmstat shows about 10,000K/s average. This is consistent with 'dd' operations I use to copy partitions for disk mirroring/backup. Under 2217, the xfer speed drops to near 1,000K/s. This is for both 'badblocks' and a 'dd' if=/dev/hda of=/dev/hdb bs=256k. In both instances, I notice a near 90% performance degredation. Haven't tried any latest 2.2.18's -- has there been any work that might have fixed this problem in 2218. Am I the only person who noticed this? I.e. -- maybe it's something peculiar to my HW (Inspiron 7500), IBM DARA-22.5G HD. -- L A Walsh | Trust Technology, Core Linux, SGI law@sgi.com | Voice/Vmail: (650) 933-5338 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/