Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756275AbXFTXGW (ORCPT ); Wed, 20 Jun 2007 19:06:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751488AbXFTXGO (ORCPT ); Wed, 20 Jun 2007 19:06:14 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:45518 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750763AbXFTXGN (ORCPT ); Wed, 20 Jun 2007 19:06:13 -0400 Message-ID: <4679B2DE.9090903@garzik.org> Date: Wed, 20 Jun 2007 19:06:06 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.12 (X11/20070530) MIME-Version: 1.0 To: Carlo Wood , linux-kernel@vger.kernel.org Subject: Re: SATA Harddisk speed drop of 100 MB/s References: <20070620224847.GA5488@alinoe.com> In-Reply-To: <20070620224847.GA5488@alinoe.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.3 (----) X-Spam-Report: SpamAssassin version 3.1.9 on srv5.dvmed.net summary: Content analysis details: (-4.3 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 638 Lines: 23 Carlo Wood wrote: > hdparm -tT gives over 160 MB/s for my tripple 10k rpm Raptor RAID5 > on 2.6.18, as expected. > > In 2.6.22-rc5 this dropped to only 60 MB/s ! > > Is this a known issue? > > I also measured it with bonnie; I get 108 MB/s reading speed on > 2.6.18 and only 68 MB/s on 2.6.22-rc5. More info needed... kernel config, before-and-after dmesg output, lspci output. Jeff - 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/