X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=linux-2.6-720-undo-rttzero.patch;fp=linux-2.6-720-undo-rttzero.patch;h=526f3f5786af04795017edfbe577505e17c3ea08;hb=d3da589a1fe22f84ac03cbd189ec9027ae6366e6;hp=0000000000000000000000000000000000000000;hpb=d82ad652ce76bd9b06f92e33448f26cdb4d827f3;p=linux-2.6.git

diff --git a/linux-2.6-720-undo-rttzero.patch b/linux-2.6-720-undo-rttzero.patch
new file mode 100644
index 000000000..526f3f578
--- /dev/null
+++ b/linux-2.6-720-undo-rttzero.patch
@@ -0,0 +1,17 @@
+diff -Ndur linux-2.6.32-orig/net/ipv4/tcp_input.c linux-2.6.32-undorttzero/net/ipv4/tcp_input.c
+--- linux-2.6.32-orig/net/ipv4/tcp_input.c	2013-06-05 15:47:10.551009408 -0400
++++ linux-2.6.32-undorttzero/net/ipv4/tcp_input.c	2013-06-05 15:49:32.458996663 -0400
+@@ -5783,9 +5783,11 @@
+ 
+ 				/* tcp_ack considers this ACK as duplicate
+ 				 * and does not calculate rtt.
+-				 * Force it here.
++				 * Fix it at least with timestamps.
+ 				 */
+-				tcp_ack_update_rtt(sk, 0, 0);
++				if (tp->rx_opt.saw_tstamp && 
++					tp->rx_opt.rcv_tsecr && !tp->srtt)
++						tcp_ack_saw_tstamp(sk, 0);
+ 
+ 				if (tp->rx_opt.tstamp_ok)
+ 					tp->advmss -= TCPOLEN_TSTAMP_ALIGNED;