linux-kernel - Re: [PATCH 03/15] kmemleak: Add the slab memory allocation/freeing hooks

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Message-ID: <Pine.LNX.4.64.0812181334590.17255@quilx.com>
Date:	Thu, 18 Dec 2008 13:35:50 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Catalin Marinas <catalin.marinas@....com>
cc:	Pekka Enberg <penberg@...helsinki.fi>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/15] kmemleak: Add the slab memory allocation/freeing
 hooks

On Thu, 18 Dec 2008, Catalin Marinas wrote:

> OK, but is there a chance that an stale pointer remains in such caches?

Definitely. The pointers are never cleared. There are counters in the
caches that are used to index into an array.

> There seems to be the transfer_objects() function that moves pointers
> around but doesn't clear the source values.

No need to. The counter updates take care of things.

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