Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=26722873a460703e319462afa7ebb8ed3a036c07
Commit: 26722873a460703e319462afa7ebb8ed3a036c07
Parent: a96fb49be3dd2031f722bf32af6ed7db965b60f7
Author: David S. Miller <[EMAIL PROTECTED]>
AuthorDate: Fri Aug 24 22:21:50 2007 -0700
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Sun Aug 26 18:35:36 2007 -0700
[TCP]: Describe tcp_init_cwnd() thoroughly in a comment.
People often get tripped up by this function and think that
it does not implemented the prescribed algorithms from
RFC2414 and RFC3390, even though it does.
So add a comment to head off such misunderstandings in the
future.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
net/ipv4/tcp_input.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index f030435..9785df3 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -755,7 +755,15 @@ void tcp_update_metrics(struct sock *sk)
}
}
-/* Numbers are taken from RFC2414. */
+/* Numbers are taken from RFC3390.
+ *
+ * John Heffner states:
+ *
+ * The RFC specifies a window of no more than 4380 bytes
+ * unless 2*MSS > 4380. Reading the pseudocode in the RFC
+ * is a bit misleading because they use a clamp at 4380 bytes
+ * rather than use a multiplier in the relevant range.
+ */
__u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst)
{
__u32 cwnd = (dst ? dst_metric(dst, RTAX_INITCWND) : 0);
-
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