linux-kernel - Re: [RFC/PATCH 3/3] SLOB: make ksize() more strict for page allocator pass-through

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Message-ID: <483473EA.40901@cs.helsinki.fi>
Date:	Wed, 21 May 2008 22:11:38 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Matt Mackall <mpm@...enic.com>
CC:	linux-kernel@...r.kernel.org, clameter@....com,
	lethal@...ux-sh.org, dhowells@...hat.com
Subject: Re: [RFC/PATCH 3/3] SLOB: make ksize() more strict for page	allocator
 pass-through

Matt Mackall wrote:
> We already know users (ie nommu memory usage reporting) are abusing this
> interface. Making them blow up is unnecessary. Just give them wrong
> answers. Issuing a warning might be a good idea for debugging.

But kobjsize() never calls ksize() with SLOB as it doesn't set PageSlab. 
Or are you talking about something else here?

Matt Mackall wrote:
> Second, I'd prefer to keep this sort of debugging code out of SLOB.
> SLUB is much better suited to debugging allocator abuse.

Fair enough. I'll drop the patch.
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