linux-kernel - Re: [patch 2/2] Slab allocators: Drop support for destructors

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Message-ID: <20070512013325.GB27172@linux-sh.org>
Date:	Sat, 12 May 2007 10:33:25 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	clameter@....com
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [patch 2/2] Slab allocators: Drop support for destructors

On Fri, May 11, 2007 at 09:57:51AM -0700, clameter@....com wrote:
> There is no user of destructors left. There is no reason why we should
> keep checking for destructors calls in the slab allocators.
> 
> The RFC for this patch was discussed at
> http://marc.info/?l=linux-kernel&m=117882364330705&w=2
> 
> Destructors were mainly used for list management which required them to take a
> spinlock. Taking a spinlock in a destructor is a bit risky since the slab
> allocators may run the destructors anytime they decide a slab is no longer
> needed.
> 
> Patch drops destructor support. Any attempt to use a destructor will BUG().
> 
> Cc: Pekka Enberg <penberg@...helsinki.fi>
> Cc: Paul Mundt <lethal@...ux-sh.org>
> Signed-off-by: Christoph Lameter <clameter@....com>
> 
Acked-by: Paul Mundt <lethal@...ux-sh.org>
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