From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e1.ny.us.ibm.com (8.12.10/8.12.10) with ESMTP id iAHHCMDi005680 for ; Wed, 17 Nov 2004 12:12:22 -0500 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.12.10/NCO/VER6.6) with ESMTP id iAHHCJOd267098 for ; Wed, 17 Nov 2004 12:12:22 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11/8.12.11) with ESMTP id iAHHCIRR024749 for ; Wed, 17 Nov 2004 12:12:18 -0500 Subject: Re: [Lhms-devel] [RFC] fix for hot-add enabled SRAT/BIOS and numa KVA areas From: Dave Hansen In-Reply-To: <1100659057.26335.125.camel@knk> References: <1100659057.26335.125.camel@knk> Content-Type: text/plain Message-Id: <1100711519.5838.2.camel@localhost> Mime-Version: 1.0 Date: Wed, 17 Nov 2004 09:11:59 -0800 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: keith Cc: external hotplug mem list , linux-mm , Chris McDermott List-ID: On Tue, 2004-11-16 at 18:37, keith wrote: > The numa KVA code used the node_start and node_end values (obtained > from the above memory ranges) to make it's lowmem reservations. The > problem is that the lowmem area reserved is quite large. It reserves > the entire a lmem_map large enough for 0x1000000 address space. I don't > feel this is a great use of lowmem on my system :) It does seem silly to waste all of that lowmem for memory that *might* be there, but what do you plan to do for contiguous address space (for mem_map) once the memory addition occurs? We've always talked about having to preallocate mem_map space on 32-bit platforms and by your patch it appears that this isn't what you want to do. -- 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: aart@kvack.org