From: Chas Williams <chas@cmf.nrl.navy.mil>
Date: Sun, 13 Aug 2006 17:41:54 +0000 (+0000)
Subject: STABLE14-fix-congestion-tracking-20060813
X-Git-Tag: openafs-stable-1_4_2rc1~17
X-Git-Url: https://git.michaelhowe.org/gitweb/?a=commitdiff_plain;h=2a9c655223d5b340a5394154113fe527e6f36938;p=packages%2Fo%2Fopenafs.git

STABLE14-fix-congestion-tracking-20060813

FIXES 36951

fix congestion tracking


(cherry picked from commit 031c1819239b5ece45027b25283d980ddc507c93)
---

diff --git a/src/rx/rx.c b/src/rx/rx.c
index 27d9e97c8..42a9b51ca 100644
--- a/src/rx/rx.c
+++ b/src/rx/rx.c
@@ -3710,10 +3710,11 @@ rxi_ReceiveAckPacket(register struct rx_call *call, struct rx_packet *np,
 	 * be unable to accept packets of the size that prior AFS versions would
 	 * send without asking.  */
 	if (peer->maxMTU != tSize) {
+	    if (peer->maxMTU > tSize) /* possible cong., maxMTU decreased */
+		peer->congestSeq++;
 	    peer->maxMTU = tSize;
 	    peer->MTU = MIN(tSize, peer->MTU);
 	    call->MTU = MIN(call->MTU, tSize);
-	    peer->congestSeq++;
 	}
 
 	if (np->length == rx_AckDataSize(ap->nAcks) + 3 * sizeof(afs_int32)) {