From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 1 Oct 2004 16:04:30 -0300 From: Marcelo Tosatti Subject: Re: [RFC] memory defragmentation to satisfy high order allocations Message-ID: <20041001190430.GA4372@logos.cnet> References: <20041001182221.GA3191@logos.cnet> <20041001131147.3780722b.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041001131147.3780722b.akpm@osdl.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org, piggin@cyberone.com.au, arjanv@redhat.com, linux-kernel@vger.kernel.org, haveblue@us.ibm.com List-ID: On Fri, Oct 01, 2004 at 01:11:47PM -0700, Andrew Morton wrote: > Marcelo Tosatti wrote: > > > > The following patch implements a "coalesce_memory()" function > > which takes "zone" and "order" as a parameter. > > > > It tries to move enough physically nearby pages to form a free area > > of "order" size. > > > > It does that by checking whether the page can be moved, allocating a new page, > > unmapping the pte's to it, copying data to new page, remapping the ptes, > > and reinserting the page on the radix/LRU. > > Presumably this duplicates some of the memory hot-remove patches. As far as I have researched, the memory moving/remapping code on the hot remove patches dont work correctly. Please correct me. And what I've seen (from the Fujitsu guys) was quite ugly IMHO. > Apparently Dave Hansen has working and sane-looking hot remove code > which is in a close-to-submittable state. 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