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authorEric Dumazet <edumazet@google.com>2023-08-01 20:52:52 +0000
committerJakub Kicinski <kuba@kernel.org>2023-08-02 18:44:55 -0700
commitce7c7fef147311d0675aa8351ff72e0be1d5b3eb (patch)
tree4d4fd2bbf4faeabf744c365f14a2c736f5ac65e3 /drivers/net
parent09c2c90705bb64986d499c4a4f3fd659761b637c (diff)
net: tun: change tun_alloc_skb() to allow bigger paged allocations
tun_alloc_skb() is currently calling sock_alloc_send_pskb() forcing order-0 page allocations. Switch to PAGE_ALLOC_COSTLY_ORDER, to increase max allocation 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/20230801205254.400094-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/tun.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d75456adc62a..8a48431e8c5b 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1526,8 +1526,10 @@ static struct sk_buff *tun_alloc_skb(struct tun_file *tfile,
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 ERR_PTR(err);