linux-kernel - Re: [PATCH v2 1/4] mm/zswap: bugfix: memory leak when re-swapon

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Date:	Fri, 06 Sep 2013 14:31:16 +0800
From:	Bob Liu <bob.liu@...cle.com>
To:	Weijie Yang <weijie.yang@...sung.com>
CC:	sjenning@...ux.vnet.ibm.com, minchan@...nel.org,
	weijie.yang.kh@...il.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] mm/zswap: bugfix: memory leak when re-swapon



On 09/06/2013 01:16 PM, Weijie Yang wrote:
> zswap_tree is not freed when swapoff, and it got re-kmalloc in swapon,
> so memory-leak occurs.
> 
> Modify: free memory of zswap_tree in zswap_frontswap_invalidate_area().
> 
> Signed-off-by: Weijie Yang <weijie.yang@...sung.com>

Reviewed-by: Bob Liu <bob.liu@...cle.com>

> ---
>  mm/zswap.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/mm/zswap.c b/mm/zswap.c
> index deda2b6..cbd9578 100644
> --- a/mm/zswap.c
> +++ b/mm/zswap.c
> @@ -816,6 +816,10 @@ static void zswap_frontswap_invalidate_area(unsigned type)
>  	}
>  	tree->rbroot = RB_ROOT;
>  	spin_unlock(&tree->lock);
> +
> +	zbud_destroy_pool(tree->pool);
> +	kfree(tree);
> +	zswap_trees[type] = NULL;
>  }
>  
>  static struct zbud_ops zswap_zbud_ops = {
> 

-- 
Regards,
-Bob
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