From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: Areca driver recap + status Date: Tue, 27 Jun 2006 17:36:59 +0100 Message-ID: <1151426219.32186.49.camel@localhost.localdomain> References: <09be01c695b3$2ed8c2c0$c100a8c0@robm> <20060621222826.ff080422.akpm@osdl.org> <1151333338.2673.4.camel@mulgrave.il.steeleye.com> <057801c69970$70b45090$0e00cb0a@robm> <1151422074.3340.25.camel@mulgrave.il.steeleye.com> <1151423500.32186.39.camel@localhost.localdomain> <1151422767.3340.29.camel@mulgrave.il.steeleye.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:28292 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S1161153AbWF0QV1 (ORCPT ); Tue, 27 Jun 2006 12:21:27 -0400 In-Reply-To: <1151422767.3340.29.camel@mulgrave.il.steeleye.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: Robert Mueller , Andrew Morton , rdunlap@xenotime.net, hch@infradead.org, erich@areca.com.tw, brong@fastmail.fm, dax@gurulabs.com, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Ar Maw, 2006-06-27 am 10:39 -0500, ysgrifennodd James Bottomley: > On Tue, 2006-06-27 at 16:51 +0100, Alan Cox wrote: > > On x86_64 the dma_addr_t and the ulong are both 64bit so the problem > > doesn't arise. > > Yes it does ... apparently 32 bit kernel on x86_64 is a lot more common > than people suppose. In > 4GB this is exactly PAE. In your original mail you stated "It probably is only significant on x86_64 with the gart iommu enabled." IOMMU is only in the 64bit kernel that I can see.