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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-09-20 11:37:19 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:52:12 -0700
commitb76892051cf1c04d95872838e70146f65e3b9d75 (patch)
tree475050b8e41eb317144465b1e2b9255fbad188b4 /include/net/tcp.h
parentc96fd3d461fa495400df24be3b3b66f0e0b152f9 (diff)
[TCP]: Avoid clearing sacktag hint in trivial situations
There's no reason to clear the sacktag skb hint when small part of the rexmit queue changes. Account changes (if any) instead when fragmenting/collapsing. RTO/FRTO do not touch SACKED_ACKED bits so no need to discard SACK tag hint at all. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index d78ad9bfcfa..456983d1fce 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1067,11 +1067,15 @@ static inline void tcp_mib_init(void)
}
/* from STCP */
-static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp) {
+static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp) {
tp->lost_skb_hint = NULL;
tp->scoreboard_skb_hint = NULL;
tp->retransmit_skb_hint = NULL;
tp->forward_skb_hint = NULL;
+}
+
+static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp) {
+ tcp_clear_retrans_hints_partial(tp);
tp->fastpath_skb_hint = NULL;
}