On Sat, Mar 3, 2012 at 3:24 PM, Glauber Costa [off-list ref] wrote:

On 03/03/2012 01:38 PM, Suleiman Souhlal wrote:

quoted

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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