netdev - [PATCH net-next 2/4] net: increase default NAPI_SKB_CACHE

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Message-Id: <20251118070646.61344-3-kerneljasonxing@gmail.com>
Date: Tue, 18 Nov 2025 15:06:44 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org
Cc: netdev@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next 2/4] net: increase default NAPI_SKB_CACHE_BULK to 32

From: Jason Xing <kernelxing@...cent.com>

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@...gle.com>
Signed-off-by: Jason Xing <kernelxing@...cent.com>
---
 net/core/skbuff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e4abf0e56776..b6fe7ab85c4a 100644
--- 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 {
-- 
2.41.3