| Re: [PATCH 04/10] memcg: Introduce __GFP_NOACCOUNT. [message #45806 is a reply to message #45410] |
Sun, 04 March 2012 00:10  |
Suleiman Souhlal
Messages: 64
Registered: February 2012
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Member |
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On Sat, Mar 3, 2012 at 3:24 PM, Glauber Costa <glommer@parallels.com> wrote:
> On 03/03/2012 01:38 PM, Suleiman Souhlal wrote:
>> Another possible example might be the skb data, which are just kmalloc
>> and are already accounted by your TCP accounting changes, so we might
>> not want to account them a second time.
>
>
> How so?
>
> struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
> int fclone, int node)
> {
> [ ... ]
> cache = fclone ? skbuff_fclone_cache : skbuff_head_cache;
>
> /* Get the HEAD */
> skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node);
Just a few lines below:
data = kmalloc_node_track_caller(size, gfp_mask, node);
-- Suleiman
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