Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=15d33c070ddde99f7368e6b17b71d22c866f97d9
Commit:     15d33c070ddde99f7368e6b17b71d22c866f97d9
Parent:     699784b7614ce61b16a075445b8e5b6c379c5086
Author:     David S. Miller <[EMAIL PROTECTED]>
AuthorDate: Mon Apr 9 13:23:14 2007 -0700
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Apr 9 13:31:15 2007 -0700

    [TCP]: slow_start_after_idle should influence cwnd validation too
    
    For the cases that slow_start_after_idle are meant to deal
    with, it is almost a certainty that the congestion window
    tests will think the connection is application limited and
    we'll thus decrease the cwnd there too.  This defeats the
    whole point of setting slow_start_after_idle to zero.
    
    So test it there too.
    
    We do not cancel out the entire tcp_cwnd_validate() function
    so that if the sysctl is changed we still have the validation
    state maintained.
    
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 net/ipv4/tcp_output.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 688b955..3c24881 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -943,7 +943,8 @@ static void tcp_cwnd_validate(struct sock *sk, struct 
tcp_sock *tp)
                if (tp->packets_out > tp->snd_cwnd_used)
                        tp->snd_cwnd_used = tp->packets_out;
 
-               if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= 
inet_csk(sk)->icsk_rto)
+               if (sysctl_tcp_slow_start_after_idle &&
+                   (s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= 
inet_csk(sk)->icsk_rto)
                        tcp_cwnd_application_limited(sk);
        }
 }
-
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