Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762176AbYF0Rw5 (ORCPT ); Fri, 27 Jun 2008 13:52:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752785AbYF0Rwt (ORCPT ); Fri, 27 Jun 2008 13:52:49 -0400 Received: from 8bytes.org ([88.198.83.132]:39408 "EHLO 8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751402AbYF0Rwt (ORCPT ); Fri, 27 Jun 2008 13:52:49 -0400 Date: Fri, 27 Jun 2008 19:52:47 +0200 From: Joerg Roedel To: Muli Ben-Yehuda Cc: Andi Kleen , Adrian Bunk , Joerg Roedel , tglx@linutronix.de, mingo@redhat.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, bhavna.sarathy@amd.com, Sebastian.Biemueller@amd.com, robert.richter@amd.com, Ben-Ami Yassour1 Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry Message-ID: <20080627175247.GH10197@8bytes.org> References: <878wwrq6im.fsf@basil.nowhere.org> <20080627163945.GA26130@il.ibm.com> <20080627165430.GD10197@8bytes.org> <20080627165947.GB26130@il.ibm.com> <20080627170546.GE10197@8bytes.org> <20080627171201.GC26130@il.ibm.com> <20080627172030.GF10197@8bytes.org> <20080627173100.GD26130@il.ibm.com> <20080627174034.GG10197@8bytes.org> <20080627174415.GF26130@il.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080627174415.GF26130@il.ibm.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 949 Lines: 23 On Fri, Jun 27, 2008 at 01:44:15PM -0400, Muli Ben-Yehuda wrote: > On Fri, Jun 27, 2008 at 07:40:35PM +0200, Joerg Roedel wrote: > > > Yes. As I said, this is for the non-isolating case. For the > > isolation case (which is needed for protection) it is harder to > > optimize. But there I think about some sort of lazy IOMMU TLB > > flushing. The flushing and 'wait for the flush to finish' is the > > most expensive part in the mapping and unmapping code path. But this > > needs some experiments. > > Agreed. The paper I just posted to the iommu mailing list has some > ideas and experimental data. Cool. I wasn't aware if that paper. I will read it next week. Thanks for the pointer to it. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/