From de799101519aad23c6096041ba2744d7b5517e6a Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Wed, 2 Mar 2022 11:55:31 -0800 Subject: net: Add skb_clear_tstamp() to keep the mono delivery_time Right now, skb->tstamp is reset to 0 whenever the skb is forwarded. If skb->tstamp has the mono delivery_time, clearing it can hurt the performance when it finally transmits out to fq@phy-dev. The earlier patch added a skb->mono_delivery_time bit to flag the skb->tstamp carrying the mono delivery_time. This patch adds skb_clear_tstamp() helper which keeps the mono delivery_time and clears everything else. The delivery_time clearing will be postponed until the stack knows the skb will be delivered locally. It will be done in a latter patch. Signed-off-by: Martin KaFai Lau Signed-off-by: David S. Miller --- drivers/net/loopback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index d05f86fe78c9..720394c0639b 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -74,7 +74,7 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb, skb_tx_timestamp(skb); /* do not fool net_timestamp_check() with various clock bases */ - skb->tstamp = 0; + skb_clear_tstamp(skb); skb_orphan(skb); -- cgit v1.2.3