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Date: Fri, 3 Dec 2010 15:33:44 -0800 From: Nandita Dukkipati <nanditad@...gle.com> To: "David S. Miller" <davem@...emloft.net> Cc: Laurent Chavey <chavey@...gle.com>, Yuchung Cheng <ycheng@...gle.com>, netdev@...r.kernel.org, Nandita Dukkipati <nanditad@...gle.com> Subject: [PATCH 1/1] TCP: Bug fix in initialization of receive window. The bug has to do with boundary checks on the initial receive window. If the initial receive window falls between init_cwnd and the receive window specified by the user, the initial window is incorrectly brought down to init_cwnd. The correct behavior is to allow it to remain unchanged. Signed-off-by: Nandita Dukkipati <nanditad@...gle.com> --- net/ipv4/tcp_output.c | 9 ++++----- 1 files changed, 4 insertions(+), 5 deletions(-) diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 749b649..31fd0bd 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -231,11 +231,10 @@ void tcp_select_initial_window(int __space, __u32 mss, /* when initializing use the value from init_rcv_wnd * rather than the default from above */ - if (init_rcv_wnd && - (*rcv_wnd > init_rcv_wnd * mss)) - *rcv_wnd = init_rcv_wnd * mss; - else if (*rcv_wnd > init_cwnd * mss) - *rcv_wnd = init_cwnd * mss; + if (init_rcv_wnd) + *rcv_wnd = min(*rcv_wnd, init_rcv_wnd * mss); + else + *rcv_wnd = min(*rcv_wnd, init_cwnd * mss); } /* Set the clamp no higher than max representable value */ -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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