From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e31.co.us.ibm.com (8.12.10/8.12.9) with ESMTP id j88HivDC310532 for ; Thu, 8 Sep 2005 13:44:57 -0400 Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by d03relay04.boulder.ibm.com (8.12.10/NCO/VERS6.7) with ESMTP id j88HjDui524200 for ; Thu, 8 Sep 2005 11:45:14 -0600 Received: from d03av03.boulder.ibm.com (loopback [127.0.0.1]) by d03av03.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id j88HipQK006489 for ; Thu, 8 Sep 2005 11:44:51 -0600 Subject: Re: [PATCH] i386: single node SPARSEMEM fix From: Dave Hansen In-Reply-To: <20050907164945.14aba736.akpm@osdl.org> References: <20050906035531.31603.46449.sendpatchset@cherry.local> <1126114116.7329.16.camel@localhost> <512850000.1126117362@flay> <1126117674.7329.27.camel@localhost> <521510000.1126118091@flay> <20050907164945.14aba736.akpm@osdl.org> Content-Type: text/plain Date: Wed, 07 Sep 2005 17:46:34 -0700 Message-Id: <1126140395.6354.14.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: "Martin J. Bligh" , magnus@valinux.co.jp, Linux Kernel Mailing List , linux-mm , "A. P. Whitcroft [imap]" List-ID: On Wed, 2005-09-07 at 16:49 -0700, Andrew Morton wrote: > "Martin J. Bligh" wrote: > > Ah, OK - makes more sense. However, some machines do have large holes > > in e820 map setups - is not really critical, more of an efficiency > > thing. > > Confused. Does all this mean that we want the patch, or not? I say we wait on it. Martin brings up a scenario in which SPARSEMEM is useful without NUMA, but it Magnus's patch doesn't actually deal with systems like that. Let's do it right, and base the memory_present() calls off of real data from the e820 or efi data. -- Dave -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org