From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264137AbTDPV77 (ORCPT ); Wed, 16 Apr 2003 17:59:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264418AbTDPV77 (ORCPT ); Wed, 16 Apr 2003 17:59:59 -0400 Received: from c-97a870d5.037-69-73746f23.cust.bredbandsbolaget.se ([213.112.168.151]:35200 "EHLO zaphod.guide") by vger.kernel.org with ESMTP id S264137AbTDPV77 (ORCPT ); Wed, 16 Apr 2003 17:59:59 -0400 To: andre@linux-ide.org Cc: linux-kernel@vger.kernel.org Subject: HPT374 performs badly in 2.5.67 From: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Date: 17 Apr 2003 00:10:19 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org My disks connected to a hpt374 controller are a lot slower in linux 2.5.67 than 2.4.21-pre5. Under 2.4 I get ~40 MB/s (as expected), but with 2.5.67 the rates drop to ~30 MB/s. The system is an Alpha SX164. Disks are one Western Digital WD880BB, and one Seagate Barracuda V 120GB. Is there any explanation, or (better) fix, for this degradation? -- Måns Rullgård mru@users.sf.net