netdev - Re: [PATCH net-next 13/13] net: switch secpath to use skb extension infrastructure

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Date:   Tue, 11 Dec 2018 09:06:05 +0100
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Florian Westphal <fw@...len.de>
CC:     <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 13/13] net: switch secpath to use skb extension
 infrastructure

On Mon, Dec 10, 2018 at 03:50:06PM +0100, Florian Westphal wrote:
>  }
> @@ -552,11 +517,6 @@ void __init xfrm_input_init(void)
>  	if (err)
>  		gro_cells.cells = NULL;
>  
> -	secpath_cachep = kmem_cache_create("secpath_cache",
> -					   sizeof(struct sec_path),
> -					   0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
> -					   NULL);

This is not so nice. Usually we need a secpath per packet for IPsec.
With removing the cache, we have to kmalloc a secpath for each packet.
This might have some performance impact.