lkml.org 
[lkml]   [2008]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 27/47] tcp: Limit cwnd growth when deferring for GSO
    -stable review patch.  If anyone has any objections, please let us know.

    ------------------
    From: John Heffner <johnwheffner@gmail.com>

    [ upstream commit: 246eb2af060fc32650f07203c02bdc0456ad76c7 ]

    This fixes inappropriately large cwnd growth on sender-limited flows
    when GSO is enabled, limiting cwnd growth to 64k.

    [ Backport to 2.6.25 by replacing sk->sk_gso_max_size with 65536 -DaveM ]

    Signed-off-by: John Heffner <johnwheffner@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    ---
    net/ipv4/tcp_cong.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/net/ipv4/tcp_cong.c
    +++ b/net/ipv4/tcp_cong.c
    @@ -287,7 +287,8 @@ int tcp_is_cwnd_limited(const struct soc

    left = tp->snd_cwnd - in_flight;
    if (sk_can_gso(sk) &&
    - left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd)
    + left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd &&
    + left * tp->mss_cache < 65536)
    return 1;
    return left <= tcp_max_burst(tp);
    }
    --


    \
     
     \ /
      Last update: 2008-06-14 02:23    [W:4.112 / U:0.064 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site