DEVEL15-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 ff973735fe653be0122dd12e5aac9aedff3c3fd3..6891a2c92ad7a161eab7cb7664f8db9370fea0b6 100644 (file)
--- a/src/rx/rx.c
+++ b/src/rx/rx.c
@@ -3771,10 +3771,11 @@ 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)) {