From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 12 Feb 2008 12:10:18 -0800 (PST) From: Christoph Lameter Subject: Re: Fastpath prototype? In-Reply-To: <200802121140.12040.ak@suse.de> Message-ID: References: <20080211235607.GA27320@wotan.suse.de> <200802121140.12040.ak@suse.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Nick Piggin , Andrew Morton , Mel Gorman , linux-mm@kvack.org, Pekka J Enberg List-ID: On Tue, 12 Feb 2008, Andi Kleen wrote: > But if you add another fast path you should first remove the old one > at least. Definitely thinking about that. We could just drop the pcp stuff. The current page allocator "fastpath" causes a 5% regression on my in kernel page allocator benchmarks and also on Mel's tests. The current pcp page queuing is mainly useful to hold off zone lock contention. -- 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