linux-kernel - Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

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Message-ID: <46932F5C.20709@yahoo.com.au>
Date:	Tue, 10 Jul 2007 17:03:56 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Matt Mackall <mpm@...enic.com>
CC:	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	linux-mm@...r.kernel.org, suresh.b.siddha@...el.com,
	corey.d.gough@...el.com, Pekka Enberg <penberg@...helsinki.fi>,
	Denis Vlasenko <vda.linux@...glemail.com>,
	Erik Andersen <andersen@...epoet.org>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

Matt Mackall wrote:
> On Tue, Jul 10, 2007 at 11:58:44AM +1000, Nick Piggin wrote:

>>Just a fancy way of saying roughly that memory waste will increase as
>>the size of the system increases. But that aspect of it I think is
>>not really a problem for non-tiny systems anyway because the waste
>>tends not to be too bad (and possibly the number of active allocations
>>does not increase O(n) with the size of RAM either).
> 
> 
> If active allocations doesn't increase O(n) with the size of RAM,
> what's all that RAM for?
> 
> If your memory isn't getting used for large VMAs or large amounts of
> page cache, that means it's getting used by task structs,
> radix_tree_nodes, sockets, dentries, inodes, etc.

Yeah you could be right. Actually you most likey _are_ right for many
workloads.

-- 
SUSE Labs, Novell Inc.
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