From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262389AbUBXSmW (ORCPT ); Tue, 24 Feb 2004 13:42:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262396AbUBXSmW (ORCPT ); Tue, 24 Feb 2004 13:42:22 -0500 Received: from mx1.redhat.com ([66.187.233.31]:51850 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S262377AbUBXSmM (ORCPT ); Tue, 24 Feb 2004 13:42:12 -0500 Date: Tue, 24 Feb 2004 10:41:06 -0800 From: "David S. Miller" To: Andi Kleen Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org, richard.brunner@amd.com Subject: Re: IOMMUs was Re: Intel vs AMD x86-64 Message-Id: <20040224104106.31f63d10.davem@redhat.com> In-Reply-To: <20040227022849.6d9f88ef.ak@suse.de> References: <20040223134853.5947a414.davem@redhat.com.suse.lists.linux.kernel> <20040224101340.47341f28.davem@redhat.com> <20040227022849.6d9f88ef.ak@suse.de> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; sparc-unknown-linux-gnu) X-Face: "_;p5u5aPsO,_Vsx"^v-pEq09'CU4&Dc1$fQExov$62l60cgCc%FnIwD=.UF^a>?5'9Kn[;433QFVV9M..2eN.@4ZWPGbdi<=?[:T>y?SD(R*-3It"Vj:)"dP Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 27 Feb 2004 02:28:49 +0100 Andi Kleen wrote: > Also the other part of the dumbness is that the flush is global, not per mapping. I guess > you don't have that problem on Sparc64. Yes, we can per-page flush, but I don't use that feature at all since I do the "flush all when wrap around IOMMU pte table" thing we're discussing. In fact there is no "global flush" so what I have to do is use diagnostic accesses to the IOMMU TLB to kick out the entries one by one.