Re: [Devel] [PATCH 1/6] slab: cleanup kmem_cache_create_memcg()

[Vasily Averin]

On 12/18/2013 05:16 PM, Vladimir Davydov wrote:
> --- a/mm/slab_common.c
> +++ b/mm/slab_common.c
> @@ -176,8 +176,9 @@ kmem_cache_create_memcg(struct mem_cgroup *memcg, const char *name, size_t size,
>  	get_online_cpus();
>  	mutex_lock(&slab_mutex);
>  
> -	if (!kmem_cache_sanity_check(memcg, name, size) == 0)
> -		goto out_locked;
> +	err = kmem_cache_sanity_check(memcg, name, size);
> +	if (err)
> +		goto out_unlock;
>  
>  	/*
>  	 * Some allocators will constraint the set of valid flags to a subset

Theoretically in future kmem_cache_sanity_check() can return positive value.
Probably it's better to check (err < 0) in caller ?

Thank you,
	Vasily Averin
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