Instead of unconditional queueing of ready-to-consume skbuff_heads
to flush_skb_cache, feed skb_cache with them instead if it's not
full already.
This greatly reduces the frequency of kmem_cache_alloc_bulk() calls.
Signed-off-by: Alexander Lobakin <[email protected]>
---
net/core/skbuff.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 57a7307689f3..ba0d5611635e 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -904,6 +904,11 @@ static inline void _kfree_skb_defer(struct sk_buff *skb)
/* drop skb->head and call any destructors for packet */
skb_release_all(skb);
+ if (nc->skb_count < NAPI_SKB_CACHE_SIZE) {
+ nc->skb_cache[nc->skb_count++] = skb;
+ return;
+ }
+
/* record skb to CPU local list */
nc->flush_skb_cache[nc->flush_skb_count++] = skb;
--
2.30.0