This is a note to let you know that I've just added the patch titled
tcp: Bug fix in initialization of receive window.
to the 2.6.36-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tcp-bug-fix-in-initialization-of-receive-window.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 18ab4520fd46404b67d415045ee5d9c4535eaacb Mon Sep 17 00:00:00 2001
From: Nandita Dukkipati <[email protected]>
Date: Fri, 3 Dec 2010 13:33:44 +0000
Subject: tcp: Bug fix in initialization of receive window.
From: Nandita Dukkipati <[email protected]>
[ Upstream commit b1afde60f2b9ee8444fba4e012dc99a3b28d224d ]
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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/ipv4/tcp_output.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -237,11 +237,10 @@ void tcp_select_initial_window(int __spa
/* 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 */
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.36/tcp-bug-fix-in-initialization-of-receive-window.patch
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