add barrier missing between producer submit and needpoke check

microsoft · Oct 4, 2024 · 07f756b · 07f756b
1 parent ecf88da
commit 07f756b
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/platform/datapath_raw_xdp_win.c b/src/platform/datapath_raw_xdp_win.c
@@ -1700,6 +1700,7 @@ CxPlatXdpTx(
     if (ProdCount > 0 ||
         (CompCount > 0 && XskRingProducerReserve(&Queue->TxRing, MAXUINT32, &TxIndex) != Queue->TxRing.Size)) {
         XskRingProducerSubmit(&Queue->TxRing, ProdCount);
+        MemoryBarrier();
         if (Xdp->TxAlwaysPoke || XskRingProducerNeedPoke(&Queue->TxRing)) {
             XSK_NOTIFY_RESULT_FLAGS OutFlags;
             QUIC_STATUS Status = Xdp->XdpApi->XskNotifySocket(Queue->TxXsk, XSK_NOTIFY_FLAG_POKE_TX, 0, &OutFlags);