Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757527AbXFLBau (ORCPT ); Mon, 11 Jun 2007 21:30:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755960AbXFLBam (ORCPT ); Mon, 11 Jun 2007 21:30:42 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:58374 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755715AbXFLBam (ORCPT ); Mon, 11 Jun 2007 21:30:42 -0400 Date: Mon, 11 Jun 2007 18:30:41 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Arjan van de Ven cc: Andrew Morton , "Keshavamurthy, Anil S" , Andi Kleen , linux-kernel@vger.kernel.org, gregkh@suse.de, muli@il.ibm.com, asit.k.mallick@intel.com, suresh.b.siddha@intel.com, ashok.raj@intel.com, shaohua.li@intel.com, davem@davemloft.net Subject: Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling In-Reply-To: <466DF290.2040503@linux.intel.com> Message-ID: References: <20070606185658.138237000@askeshav-devel.jf.intel.com> <200706090056.49279.ak@suse.de> <200706091147.24705.ak@suse.de> <20070611204442.GA4074@linux-os.sc.intel.com> <20070611141449.bfbc4769.akpm@linux-foundation.org> <20070611235208.GC25022@linux-os.sc.intel.com> <20070611173001.e0355af3.akpm@linux-foundation.org> <466DF290.2040503@linux.intel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 631 Lines: 14 On Mon, 11 Jun 2007, Arjan van de Ven wrote: > the problem with that is that if anything downstream from the iommu layer ALSO > needs memory, we've now eaten up the last free page and things go splat. Hmmm... We need something like a reservation system right? Higher levels in a atomic context could register their future needs. Then we can avoid overallocating in the iommu layer. - 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/