1 files changed, 8 insertions, 4 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f46d24b8410f..cbb83acd830a 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -687,7 +687,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 
         BUG_ON(len > skb->len);
 
-        tcp_clear_all_retrans_hints(tp);
+        tcp_clear_retrans_hints_partial(tp);
         nsize = skb_headlen(skb) - len;
         if (nsize < 0)
                 nsize = 0;
@@ -1718,9 +1718,6 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
                 BUG_ON(tcp_skb_pcount(skb) != 1 ||
                        tcp_skb_pcount(next_skb) != 1);
 
-                /* changing transmit queue under us so clear hints */
-                tcp_clear_all_retrans_hints(tp);
-
                 /* Ok.  We will be able to collapse the packet. */
                 tcp_unlink_write_queue(next_skb, sk);
 
@@ -1759,6 +1756,13 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
 
                 tcp_adjust_fackets_out(tp, skb, tcp_skb_pcount(next_skb));
                 tp->packets_out -= tcp_skb_pcount(next_skb);
+
+                /* changed transmit queue under us so clear hints */
+                tcp_clear_retrans_hints_partial(tp);
+                /* manually tune sacktag skb hint */
+                if (tp->fastpath_skb_hint == next_skb)
+                        tp->fastpath_skb_hint = skb;
+
                 sk_stream_free_skb(sk, next_skb);
         }
 }