To be more friendly with drop monitor, we should only call kfree_skb() when the packets were dropped and use consume_skb() in other cases.
Cc: Eric Dumazet <[email protected]> Signed-off-by: Jason Wang <[email protected]> --- Changes from V3: - rebase to net-next.git Changes from V2: - use unlikely() when necessary Changes from V1: - check the return value of tun/macvtap_put_user() --- drivers/net/macvtap.c | 5 ++++- drivers/net/tun.c | 5 ++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 22b4cf2..ba1e5db 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -859,7 +859,10 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q, } if (skb) { ret = macvtap_put_user(q, skb, to); - kfree_skb(skb); + if (unlikely(ret < 0)) + kfree_skb(skb); + else + consume_skb(skb); } if (!noblock) finish_wait(sk_sleep(&q->sk), &wait); diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 6d44da1..9c58286 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1362,7 +1362,10 @@ static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile, return 0; ret = tun_put_user(tun, tfile, skb, to); - kfree_skb(skb); + if (unlikely(ret < 0)) + kfree_skb(skb); + else + consume_skb(skb); return ret; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
