Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754391AbbKWNJw (ORCPT ); Mon, 23 Nov 2015 08:09:52 -0500 Received: from mx2.suse.de ([195.135.220.15]:59304 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754292AbbKWNJs (ORCPT ); Mon, 23 Nov 2015 08:09:48 -0500 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jason Wang , Vlad Yasevich , "Michael S . Tsirkin" , "David S . Miller" , Jiri Slaby Subject: [PATCH 3.12 36/72] macvtap: unbreak receiving of gro skb with frag list Date: Mon, 23 Nov 2015 14:08:58 +0100 Message-Id: <2d2d5e7745361bf7d106abd3e990579f4956ba11.1448283890.git.jslaby@suse.cz> X-Mailer: git-send-email 2.6.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1615 Lines: 46 From: Jason Wang 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ Upstream commit f23d538bc24a83c16127c2eb82c9cf1adc2b5149 ] We don't have fraglist support in TAP_FEATURES. This will lead software segmentation of gro skb with frag list. Fixes by having frag list support in TAP_FEATURES. With this patch single session of netperf receiving were restored from about 5Gb/s to about 12Gb/s on mlx4. Fixes a567dd6252 ("macvtap: simplify usage of tap_features") Cc: Vlad Yasevich Cc: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- drivers/net/macvtap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 393873fb792e..ee53a9d06e8e 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -69,7 +69,7 @@ static const struct proto_ops macvtap_socket_ops; #define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \ NETIF_F_TSO6 | NETIF_F_UFO) #define RX_OFFLOADS (NETIF_F_GRO | NETIF_F_LRO) -#define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG) +#define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG | NETIF_F_FRAGLIST) /* * RCU usage: -- 2.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/