Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1032352AbbKFHTW (ORCPT ); Fri, 6 Nov 2015 02:19:22 -0500 Received: from mail-io0-f169.google.com ([209.85.223.169]:33061 "EHLO mail-io0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032082AbbKFHTV (ORCPT ); Fri, 6 Nov 2015 02:19:21 -0500 MIME-Version: 1.0 In-Reply-To: References: Date: Fri, 6 Nov 2015 16:19:20 +0900 Message-ID: Subject: Re: GSO with udp_tunnel_xmit_skb From: Tom Herbert To: "Jason A. Donenfeld" Cc: Jiri Benc , Netdev , LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1285 Lines: 32 On Thu, Nov 5, 2015 at 7:52 PM, Jason A. Donenfeld wrote: > Hi folks, > > When sending arbitrary SKBs with udp_tunnel_xmit_skb, the networking > stack does not appear to be utilizing UFO on the outgoing UDP packets, > which significantly caps the transmission speed. I see about 50% CPU > usage in this send path, triggered for every single outgoing packet. > Is there a particular skb option I need to set to enable this? I read > Tom's patch [1] from last year, but this seems to be about setting the > inner packet type. In my case, the inner type is opaque encrypted > data, so there's not a relevant setting. > Jason, Is this about UFO or GSO (in email subject)? UFO should operate independently encapsulation or inner packet setting. Tom > Thanks, > Jason > > [1] http://thread.gmane.org/gmane.linux.network/332194 > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- 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/