From: Eric Dumazet Date: Tue, 1 Aug 2023 20:52:54 +0000 (+0000) Subject: net: tap: change tap_alloc_skb() to allow bigger paged allocations X-Git-Tag: v6.6.17~4098^2~245^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=37dfe5b8ddeb7c0bb97e3643dcfd8f9f1421ad25;p=platform%2Fkernel%2Flinux-rpi.git net: tap: change tap_alloc_skb() to allow bigger paged allocations tap_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/20230801205254.400094-5-edumazet@google.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/tap.c b/drivers/net/tap.c index 9137fb8..01574b9 100644 --- a/drivers/net/tap.c +++ b/drivers/net/tap.c @@ -614,8 +614,10 @@ static inline struct sk_buff *tap_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;