From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Subject: Re: Impact of no_lba48{_dma} = 1 ? Date: Wed, 7 Feb 2007 14:11:49 +0000 Message-ID: <20070207141149.5c0c709b@localhost.localdomain> References: <45C9A23E.3030201@imc-berlin.de> <20070207115826.2e3609e3@localhost.localdomain> <45C9D34E.1060007@imc-berlin.de> <20070207135309.66942d25@localhost.localdomain> <45C9D8F8.2000303@ru.mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:43532 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1161309AbXBGN6w (ORCPT ); Wed, 7 Feb 2007 08:58:52 -0500 In-Reply-To: <45C9D8F8.2000303@ru.mvista.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Sergei Shtylyov Cc: Steven Scholz , linux-ide@vger.kernel.org On Wed, 07 Feb 2007 16:49:44 +0300 Sergei Shtylyov wrote: > Hello. > > Alan wrote: > > >>>Only relevant for DMA really > > >>So rqsize is only needed for DMA accesses? > > Not really, it affects both PIO and DMA. Yes but its not relevant. The question was about performance, and your performance will suck equally with PIO regardless of the request size limit. Alan