From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: Query regarding modifying the DMA Mask based on the available memory in the system Date: Thu, 17 Apr 2008 01:43:11 -0700 (PDT) Message-ID: <20080417.014311.133481790.davem@davemloft.net> References: <5AE055B67BB5764693E2900C7E3699BE010CAB76@pamail.ad.lsil.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:59238 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1756402AbYDQInM (ORCPT ); Thu, 17 Apr 2008 04:43:12 -0400 In-Reply-To: <5AE055B67BB5764693E2900C7E3699BE010CAB76@pamail.ad.lsil.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Sathya.Prakash@lsi.com Cc: linux-scsi@vger.kernel.org, James.Bottomley@HansenPartnership.com From: "Prakash, Sathya" Date: Thu, 17 Apr 2008 16:40:43 +0800 > I am not sure whether this change works fine? I couldn't see any SCSI > driver using the si_meminfo and this function seems not to return the > physical layout of the memory. Physical addressing has no connection with the types of addresses that IOMMU based systems will give you, which are virtual and can be above 4GB on 64-bit systems.