linux-kernel - Re: [PATCH 2/2] slab: move kmem_cache

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Message-ID: <0000013a88eff593-50da3bb8-3294-41db-9c32-4e890ef6940a-000000@email.amazonses.com>
Date:	Mon, 22 Oct 2012 14:45:58 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH 2/2] slab: move kmem_cache_free to common code

On Mon, 22 Oct 2012, Glauber Costa wrote:

> + * kmem_cache_free - Deallocate an object
> + * @cachep: The cache the allocation was from.
> + * @objp: The previously allocated object.
> + *
> + * Free an object which was previously allocated from this
> + * cache.
> + */
> +void kmem_cache_free(struct kmem_cache *s, void *x)
> +{
> +	__kmem_cache_free(s, x);
> +	trace_kmem_cache_free(_RET_IP_, x);
> +}
> +EXPORT_SYMBOL(kmem_cache_free);
> +

This results in an additional indirection if tracing is off. Wonder if
there is a performance impact?

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