From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 29 Feb 2008 11:41:30 -0800 (PST) From: Christoph Lameter Subject: Re: [patch 6/8] slub: Adjust order boundaries and minimum objects per slab. In-Reply-To: <47C7BFFA.9010402@cs.helsinki.fi> Message-ID: References: <20080229044803.482012397@sgi.com> <20080229044819.800974712@sgi.com> <47C7BFFA.9010402@cs.helsinki.fi> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Pekka Enberg Cc: Mel Gorman , Matt Mackall , linux-mm@kvack.org List-ID: On Fri, 29 Feb 2008, Pekka Enberg wrote: > I can see why you want to change the defaults for big iron but why not keep > the existing PAGE_SHIFT check which leaves embedded and regular desktop > unchanged? The defaults for slab are also 60 objects per slab. The PAGE_SHIFT says nothing about the big iron. Our new big irons have a page shift of 12 and are x86_64. We could drop the limit if CONFIG_EMBEDDED is set but then this may waste space. A higher order allows slub to reach a higher object density (in particular for objects 500-2000 bytes size). -- 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