From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 4 Mar 2008 16:04:41 -0800 (PST) From: Christoph Lameter Subject: Re: [patch 0/8] slub: Fallback to order 0 and variable order slab support In-Reply-To: <20080304190126.GM10223@waste.org> Message-ID: References: <20080229044803.482012397@sgi.com> <20080304122008.GB19606@csn.ul.ie> <20080304190126.GM10223@waste.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Matt Mackall Cc: Mel Gorman , Pekka Enberg , linux-mm@kvack.org List-ID: On Tue, 4 Mar 2008, Matt Mackall wrote: > Thanks for looking at this, Mel. Could you try testing.. umm... > slub_max_order=1? That's never going to get us more than one more > object per slab, but if we can go from 1 per page to 1.5 per page, it > might be worth it. Task structs are roughly in that size domain. Note that you would also have decrease the number of objects per slab. good combinations: slub_max_order=3 slub_min_objects=8 (Was the config used for mm with the earlier version of higher order alloc w/o fallback) slub_max_order=1 slub_min_objects=4 (upstream config w/o fallback) The default in mm is right now slub_max_order=4 slub_min_objects=60 -- 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