linux-kernel - Re: [PATCH 3/7] memcontrol: use simple_malloc()/simple

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Message-ID: <20081116045128.GB24624@x200.localdomain>
Date:	Sun, 16 Nov 2008 07:51:28 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	kamezawa.hiroyu@...fujitsu.com,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/7] memcontrol: use simple_malloc()/simple_free()

On Sun, Nov 16, 2008 at 12:33:46PM +0800, Lai Jiangshan wrote:
> use simple_malloc()/simple_free() instead of current codes.

struct mem_cgroup can't reach the size when kmalloc starts failing.

> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -1062,11 +1062,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
>  {
>  	struct mem_cgroup *mem;
>  
> -	if (sizeof(*mem) < PAGE_SIZE)
> -		mem = kmalloc(sizeof(*mem), GFP_KERNEL);
> -	else
> -		mem = vmalloc(sizeof(*mem));
> -
> +	mem = simple_malloc(sizeof(*mem));
>  	if (mem)
>  		memset(mem, 0, sizeof(*mem));
>  	return mem;
> @@ -1074,10 +1070,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
>  
>  static void mem_cgroup_free(struct mem_cgroup *mem)
>  {
> -	if (sizeof(*mem) < PAGE_SIZE)
> -		kfree(mem);
> -	else
> -		vfree(mem);
> +	simple_free(mem);
>  }
--
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