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

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Message-ID: <20070708104243.GA12175@elte.hu>
Date:	Sun, 8 Jul 2007 12:42:43 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Christoph Lameter <clameter@....com>, 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>,
	akpm@...ux-foundation.org, Matt Mackall <mpm@...enic.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23


* Nick Piggin <nickpiggin@...oo.com.au> wrote:

> >cool. I was referring to something else: people were running -rt on 
> >their beefy desktop boxes with several gigs of RAM they complained 
> >about the slowdown that is caused by SLOB's linear list walking.
> 
> That is what I meant by scalable to large memories. It is not perfect, 
> but it is much better now. I noticed huge slowdowns too when test 
> booting the slob RCU patch on my 4GB desktop, so I did a few things to 
> improve freelist walking as well (the patches are in -mm, prefixed 
> with slob-).

ah, good - i only looked at the upstream mm/slob.c git-log. I like those 
4 slob-* patches in -mm: in particular slob-remove-bigblock-tracking.patch
and slob-rework-freelist-handling.patch are really elegant. Simplicity of 
slob does not seem to suffer either.

	Ingo
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