From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 13 Jul 2007 23:51:21 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH 3/7] Generic Virtual Memmap support for SPARSEMEM Message-Id: <20070713235121.538ddcaf.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andy Whitcroft Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, npiggin@suse.de, clameter@sgi.com, mel@csn.ul.ie List-ID: On Fri, 13 Jul 2007 14:36:08 +0100 Andy Whitcroft wrote: > SPARSEMEM is a pretty nice framework that unifies quite a bit of > code over all the arches. It would be great if it could be the > default so that we can get rid of various forms of DISCONTIG and > other variations on memory maps. So far what has hindered this are > the additional lookups that SPARSEMEM introduces for virt_to_page > and page_address. This goes so far that the code to do this has to > be kept in a separate function and cannot be used inline. > Maybe it will be our(my or Goto-san's) work to implement MEMORY_HOTADD support for this. Could you add !MEMORY_HOTPLUG in Kconfig ? Then, we'll write patch later. Or..If you'll add memory hotplug support by yourself, It's great, -Kame -- 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