net: increase default NAPI_SKB_CACHE_BULK to 32

The previous value 16 is a bit conservative, so adjust it along with
NAPI_SKB_CACHE_SIZE, which can minimize triggering memory allocation
in napi_skb_cache_get*().

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://patch.msgid.link/20251118070646.61344-3-kerneljasonxing@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e4abf0e567767eac6abbcf003804d85e60b0726f..b6fe7ab85c4a9ebd92918f30a89b8003fe943749 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -224,7 +224,7 @@ static void skb_under_panic(struct sk_buff *skb, unsigned int sz, void *addr)
 }
 
 #define NAPI_SKB_CACHE_SIZE    128
-#define NAPI_SKB_CACHE_BULK    16
+#define NAPI_SKB_CACHE_BULK    32
 #define NAPI_SKB_CACHE_HALF    (NAPI_SKB_CACHE_SIZE / 2)
 
 struct napi_alloc_cache {