From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Lidel Subject: Re: 64bit DMA in i2o_block Date: Fri, 22 Sep 2006 13:47:56 +0200 Message-ID: <4513CD6C.9050606@shadowconnect.com> References: <4513A87F.8040809@sw.ru> <4513B783.70008@shadowconnect.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from s0006.shadowconnect.net ([213.202.216.60]:4879 "EHLO mail.shadowconnect.com") by vger.kernel.org with ESMTP id S932308AbWIVLr6 (ORCPT ); Fri, 22 Sep 2006 07:47:58 -0400 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Andi Kleen Cc: linux-scsi@vger.kernel.org, devel@openvz.org Hello, Andi Kleen wrote: > Markus Lidel writes: >> I believe it's a driver issue. Do you have a testing-system where you >> could try out the appended patch? > So it would bug instead? Yes, because ATM i don't know why it doesn't work. It's just for debugging. > Can you please just get rid of that CONFIG? Such things shouldn't > be CONFIGs, but have a suitable default. In particular drivers > running under 64bit should always support 64bit DMA. The 64-bit DMA is only available on Adaptec controllers, all other I2O controllers only work with 32-bit DMA. Although the 64-bit DMA is (as far as i can remember) slower then the 32-bit DMA and is therefore only useful on systems which run out of memory. Best regards, Markus Lidel ------------------------------------------ Markus Lidel (Senior IT Consultant) Shadow Connect GmbH Carl-Reisch-Weg 12 D-86381 Krumbach Germany Phone: +49 82 82/99 51-0 Fax: +49 82 82/99 51-11 E-Mail: Markus.Lidel@shadowconnect.com URL: http://www.shadowconnect.com