Messages in this thread Patch in this message | | | From | Dong Fang <> | Subject | [PATCH] net/ipv4: fix the conditions of entering TCP_CA_Disorder state | Date | Mon, 5 Aug 2013 20:45:51 -0400 |
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if have some packets loss by network, the kernel can't reach here, we can see the tcp_time_to_recover() function:
static bool tcp_time_to_recover(struct sock *sk, int flag) { struct tcp_sock *tp = tcp_sk(sk); __u32 packets_out;
/* Trick#1: The loss is proven. */ if (tp->lost_out) return true; //... }
when it return true, the following condition will be failed:
//... if (!tcp_time_to_recover(sk, flag)) { tcp_try_to_open(sk, flag, prior_unsacked); return; } //...
Signed-off-by: Dong Fang <yp.fangdong@gmail.com> --- net/ipv4/tcp_input.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 28af45a..8ab31c1 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -2449,7 +2449,7 @@ static void tcp_try_keep_open(struct sock *sk) struct tcp_sock *tp = tcp_sk(sk); int state = TCP_CA_Open; - if (tcp_left_out(tp) || tcp_any_retrans_done(sk)) + if (tp->sacked_out || tcp_any_retrans_done(sk)) state = TCP_CA_Disorder; if (inet_csk(sk)->icsk_ca_state != state) { -- 1.7.1
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