linux-kernel - Re: + fix-spellings-of-slab-allocator-section-in-init-kconfig.patch added to -mm tree

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Message-ID: <Pine.LNX.4.64.0705082005130.21580@schroedinger.engr.sgi.com>
Date:	Tue, 8 May 2007 20:08:38 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Matt Mackall <mpm@...enic.com>, akpm@...ux-foundation.org,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org
Subject: Re: + fix-spellings-of-slab-allocator-section-in-init-kconfig.patch
 added to -mm tree

On Wed, 9 May 2007, Nick Piggin wrote:

> But that 4MB system might not even have 50 pages that you'd want to
> use for slab.

The problem here is that you trade off more objects (SLUB) against more 
flexibility (SLOB). We need some experiments with 4M systems to see how 
this works out. It may be better to be able to allocate more objects. I 
estimate that we will have a need for about 30 active slabs (note the 
low number comes about because SLUB will merge similar slabs together 
into one) on such a system. Most of those can have two pages. So you will 
likely still be better off with SLUB than SLOB.

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