| Message ID | 20210111182801.12609-3-alobakin@pm.me |
|---|---|
| State | New |
| Headers | show |
| Series | [net-next,1/5] skbuff: rename fields of struct napi_alloc_cache to be more intuitive | expand |
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 3c904c29efbb..0e8c597ff6ce 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -487,6 +487,9 @@ EXPORT_SYMBOL(__netdev_alloc_skb); static struct sk_buff *__napi_decache_skb(struct napi_alloc_cache *nc) { + if (nc->flush_skb_count) + return nc->flush_skb_cache[--nc->flush_skb_count]; + return kmem_cache_alloc(skbuff_head_cache, GFP_ATOMIC); }
Instead of unconditional allocating a new skbuff_head and unconditional flushing of flush_skb_cache, reuse the ones queued up for flushing if there are any. skbuff_heads stored in flush_skb_cache are already unreferenced from any pages or extensions and almost ready for use. We perform zeroing in __napi_alloc_skb() anyway, regardless of where did our skbuff_head came from. Signed-off-by: Alexander Lobakin <alobakin@pm.me> --- net/core/skbuff.c | 3 +++ 1 file changed, 3 insertions(+)