diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-08-01 20:52:52 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-02 18:44:55 -0700 |
| commit | ce7c7fef147311d0675aa8351ff72e0be1d5b3eb (patch) | |
| tree | 4d4fd2bbf4faeabf744c365f14a2c736f5ac65e3 /drivers/net/tun.c | |
| parent | 09c2c90705bb64986d499c4a4f3fd659761b637c (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/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 4 |
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); |