Only advance the SACK fast-path pointer for the first block, the fast-path
assumes that only the first block advances next time so we should not move the
skb for the next sack blocks.
Signed-Off-By: Baruch Even <[EMAIL PROTECTED]>
---
I'm not sure about the fack_count part, this patch changes the value that is
maintained in this case.
Index: 2.6-rc6/net/ipv4/tcp_input.c
===================================================================
--- 2.6-rc6.orig/net/ipv4/tcp_input.c 2007-01-27 14:53:27.000000000 +0200
+++ 2.6-rc6/net/ipv4/tcp_input.c 2007-01-27 15:59:22.000000000 +0200
@@ -1048,8 +1048,13 @@
int in_sack, pcount;
u8 sacked;
- tp->fastpath_skb_hint = skb;
- tp->fastpath_cnt_hint = fack_count;
+ if (i == 0) {
+ /* Only advance the hint for the first SACK
+ * block, the hint is for quickly handling the
+ * advancing of the first SACK blocks only. */
+ tp->fastpath_skb_hint = skb;
+ tp->fastpath_cnt_hint = fack_count;
+ }
/* The retransmission queue is always in order, so
* we can short-circuit the walk early.
-
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