Messages in this thread Patch in this message | | | Date | Fri, 13 Jun 2008 17:11:34 -0700 | From | Greg KH <> | Subject | [patch 27/47] tcp: Limit cwnd growth when deferring for GSO |
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-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); } --
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