From: Michael Brown <mcb30@ipxe.org>
Date: Sat, 20 Dec 2014 12:41:42 +0000 (+0000)
Subject: [hyperv] Increase TX ring size
X-Git-Tag: v1.20.1~1014
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a69c9953acea292f59c4396c31bc6d44c9dc78b2;p=thirdparty%2Fipxe.git

[hyperv] Increase TX ring size

Empirical observation suggests that 32 is a sensible size to minimise
the number of deferred packet transmissions without overflowing the
VMBus transmit ring buffer.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---

diff --git a/src/drivers/net/netvsc.h b/src/drivers/net/netvsc.h
index 8375194d9..277e08e31 100644
--- a/src/drivers/net/netvsc.h
+++ b/src/drivers/net/netvsc.h
@@ -24,7 +24,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
  * must be sufficiently small to guarantee that we never run out of
  * space in the VMBus outbound ring buffer.
  */
-#define NETVSC_TX_NUM_DESC 8
+#define NETVSC_TX_NUM_DESC 32
 
 /** RX data buffer page set ID
  *