diff options
| author | Alexander Lobakin <alobakin@pm.me> | 2021-02-13 14:12:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-02-13 14:32:04 -0800 |
| commit | d13612b58e6453fc664f282514fe2bd7b848230f (patch) | |
| tree | 40e77ecc6855d9d592229d4a572b818d4e5e0491 /net | |
| parent | f450d539c05a14c103dd174718f81bb2fe65cb4b (diff) | |
skbuff: allow to optionally use NAPI cache from __alloc_skb()
Reuse the old and forgotten SKB_ALLOC_NAPI to add an option to get
an skbuff_head from the NAPI cache instead of inplace allocation
inside __alloc_skb().
This implies that the function is called from softirq or BH-off
context, not for allocating a clone or from a distant node.
Cc: Alexander Duyck <alexander.duyck@gmail.com> # Simplified flags check
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/skbuff.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 9e1a8ded4acc..a80581eed7fc 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -405,7 +405,11 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, gfp_mask |= __GFP_MEMALLOC; /* Get the HEAD */ - skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node); + if ((flags & (SKB_ALLOC_FCLONE | SKB_ALLOC_NAPI)) == SKB_ALLOC_NAPI && + likely(node == NUMA_NO_NODE || node == numa_mem_id())) + skb = napi_skb_cache_get(); + else + skb = kmem_cache_alloc_node(cache, gfp_mask & ~GFP_DMA, node); if (unlikely(!skb)) return NULL; prefetchw(skb); |