From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 5 Dec 2006 11:32:21 -0800 (PST) From: Christoph Lameter Subject: Re: la la la la ... swappiness In-Reply-To: Message-ID: References: <200612050641.kB56f7wY018196@ms-smtp-06.texas.rr.com> <20061205085914.b8f7f48d.akpm@osdl.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Aucoin , Andrew Morton , 'Nick Piggin' , 'Tim Schmielau' , Linux Memory Management List List-ID: On Tue, 5 Dec 2006, Linus Torvalds wrote: > On Tue, 5 Dec 2006, Christoph Lameter wrote: > > We do not support swapping / reclaim for huge pages. > > Well, Louis doesn't actually _want_ swapping or reclaim on them. He just > wants the system to run well with the remaining 400MB of memory in his > machine. > > Which it doesn't. It just OOM's for some reason. If you take huge chunks of memory out of a zone then the dirty limits as well as the min free kbytes etc are all off. As a result the VM may behave strangely. F.e. too many dirty pages may cause an OOM since we do not enter synchrononous writeout during reclaim. -- 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