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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 <edumazet@google.com> Cc: Tahsin Erdogan <trdgn@amazon.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20230801205254.400094-4-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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@ -2927,8 +2927,10 @@ static struct sk_buff *packet_alloc_skb(struct sock *sk, size_t prepad,
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if (prepad + len < PAGE_SIZE || !linear)
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linear = len;
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if (len - linear > MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER))
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linear = len - MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER);
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skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock,
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err, 0);
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err, PAGE_ALLOC_COSTLY_ORDER);
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if (!skb)
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return NULL;
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