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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2008-01-30 20:06:02 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-31 19:27:22 -0800
commitad1984e844fb6edaa8b9984be23669f4e19168be (patch)
tree9f31eed6ad22ce54c3cef701854d3568d4eb8fa3
parent23fe18669e7fdaf5b229747858d943a723124e2e (diff)
[TCP]: NewReno must count every skb while marking losses
NewReno should add cnt per skb (as with FACK) instead of depending on SACKED_ACKED bits which won't be set with it at all. Effectively, NewReno should always exists after the first iteration anyway (or immediately if there's already head in lost_out. This was fixed earlier in net-2.6.25 but got reverted among other stuff and I didn't notice that this is still necessary (actually wasn't even considering this case while trying to figure out the reports because I lived with different kind of code than it in reality was). This should solve the WARN_ONs in TCP code that as a result of this triggered multiple times in every place we check for this invariant. Special thanks to Dave Young <hidave.darkstar@gmail.com> and Krishna Kumar2 <krkumar2@in.ibm.com> for trying with my debug patches. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Tested-by: Dave Young <hidave.darkstar@gmail.com> Tested-by: Krishna Kumar2 <krkumar2@in.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/tcp_input.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index fa2c85ca5bc..19c449f6267 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2153,7 +2153,7 @@ static void tcp_mark_head_lost(struct sock *sk, int packets, int fast_rexmit)
tp->lost_skb_hint = skb;
tp->lost_cnt_hint = cnt;
- if (tcp_is_fack(tp) ||
+ if (tcp_is_fack(tp) || tcp_is_reno(tp) ||
(TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED))
cnt += tcp_skb_pcount(skb);