From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: pata_ninja32 plea Date: Sun, 05 Oct 2008 05:21:43 +0900 Message-ID: <48E7D057.8040604@kernel.org> References: <20081004183010.0809322b@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:59970 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700AbYJDUXt (ORCPT ); Sat, 4 Oct 2008 16:23:49 -0400 In-Reply-To: <20081004183010.0809322b@lxorguk.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: bbee , linux-ide@vger.kernel.org, alan@redhat.com Alan Cox wrote: >> is something that will make it perform great on linux, all it would take is >> someone with a lot more clue than me to take a look at it. >> >> Anyone willing to take a look? Alan? > > There is siome minimal information in the FreeBSD driver but they never > got DMA to work properly AFAIK. If you want DMA support you'll have to go > do the work to document DMA mode and I suspect it would be quite > substantial work. ~10MB/s w/ < 25% cpu load doesn't sound like DMA. It sounds more like 32bit PIO, no? -- tejun