From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 1 Feb 2005 16:05:09 -0800 (PST) From: Christoph Lameter Subject: Re: [PATCH 2/2] Helping prezoring with reduced fragmentation allocation In-Reply-To: Message-ID: References: <20050201171641.CC15EE5E8@skynet.csn.ul.ie> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Mel Gorman Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Tue, 1 Feb 2005, Mel Gorman wrote: > > Would it not be better to zero the global 2^MAX_ORDER pages by the scrub > > daemon and have a global zeroed page list? That way you may avoid zeroing > > when splitting pages? > > > > Maybe, but right now when there are no 2^MAX_ORDER pages, the scrub daemon > is going to be doing nothing which is why I think it needs to look at the > free pages of lower orders. > > That is solveable though in one of two ways. One, the scrub daemon can > zero pages from the global list and then add them to the USERZERO pool. It > has the advantage of requiring no more memory and is simple. The second is > to create a second global list. However, I think it only makes sense to > have this as part of the scrub daemon patch (I can write it if thats a > problem) rather than a standalone patch from me. Approach one is fine and I will do an update the remaining prezero patches to do just that. When will your patches be in Linus tree? ;-) -- 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