From ae6db08f8b5606ccd95ef2aadd741905d3c13bc0 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 1 Aug 2023 20:52:53 +0000 Subject: [PATCH] net/packet: change packet_alloc_skb() to allow bigger paged allocations packet_alloc_skb() is currently calling sock_alloc_send_pskb() forcing order-0 page allocations. Switch to PAGE_ALLOC_COSTLY_ORDER, to increase max size by 8x. Also add logic to increase the linear part if needed. Signed-off-by: Eric Dumazet Cc: Tahsin Erdogan Reviewed-by: Willem de Bruijn Link: https://lore.kernel.org/r/20230801205254.400094-4-edumazet@google.com Signed-off-by: Jakub Kicinski --- net/packet/af_packet.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 8e3ddec..3b77d25 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2927,8 +2927,10 @@ static struct sk_buff *packet_alloc_skb(struct sock *sk, size_t prepad, if (prepad + len < PAGE_SIZE || !linear) linear = len; + if (len - linear > MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) + linear = len - MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER); skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock, - err, 0); + err, PAGE_ALLOC_COSTLY_ORDER); if (!skb) return NULL; -- 2.7.4