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Commit d3d2ae45 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
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tcp: Don't clear hints when tcp_fragmenting 



1) We didn't remove any skbs, so no need to handle stale refs.

2) scoreboard_skb_hint is trivial, no timestamps were changed
   so no need to clear that one

3) lost_skb_hint needs tweaking similar to that of
   tcp_sacktag_one().

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 62ad2761

net/ipv4/tcp_output.c

+6 −1
Original line number Diff line number Diff line
@@ -771,7 +771,6 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, 


	BUG_ON(len > skb->len);



	tcp_clear_retrans_hints_partial(tp);

	nsize = skb_headlen(skb) - len;

	if (nsize < 0)

		nsize = 0;
@@ -854,6 +853,12 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, 
			tcp_verify_left_out(tp);

		}

		tcp_adjust_fackets_out(sk, skb, diff);



		if (tp->lost_skb_hint &&

		    before(TCP_SKB_CB(skb)->seq,

			   TCP_SKB_CB(tp->lost_skb_hint)->seq) &&

		    (tcp_is_fack(tp) || TCP_SKB_CB(skb)->sacked))

			tp->lost_cnt_hint -= diff;

	}



	/* Link BUFF into the send queue. */