linux-kernel - [PATCH] net: skbuff: allocate the fclone in the current NUMA node

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Date: Tue, 20 Feb 2024 10:18:04 +0800
From: Huang Shijie <shijie@...amperecomputing.com>
To: kuba@...nel.org
Cc: patches@...erecomputing.com,
	davem@...emloft.net,
	horms@...nel.org,
	edumazet@...gle.com,
	ast@...nel.org,
	dhowells@...hat.com,
	linyunsheng@...wei.com,
	aleksander.lobakin@...el.com,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	cl@...amperecomputing.com,
	Huang Shijie <shijie@...amperecomputing.com>
Subject: [PATCH] net: skbuff: allocate the fclone in the current NUMA node

The current code passes NUMA_NO_NODE to __alloc_skb(), we found
it may creates fclone SKB in remote NUMA node.

So use numa_node_id() to limit the allocation to current NUMA node.

Signed-off-by: Huang Shijie <shijie@...amperecomputing.com>
---
 include/linux/skbuff.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 2dde34c29203..ebc42b2604ad 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1343,7 +1343,7 @@ static inline bool skb_fclone_busy(const struct sock *sk,
 static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
 					       gfp_t priority)
 {
-	return __alloc_skb(size, priority, SKB_ALLOC_FCLONE, NUMA_NO_NODE);
+	return __alloc_skb(size, priority, SKB_ALLOC_FCLONE, numa_node_id());
 }
 
 struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
-- 
2.40.1