Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Feb 2003 02:44:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Feb 2003 02:44:38 -0500 Received: from pizda.ninka.net ([216.101.162.242]:54214 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Thu, 20 Feb 2003 02:44:37 -0500 Date: Wed, 19 Feb 2003 23:38:55 -0800 (PST) Message-Id: <20030219.233855.06545451.davem@redhat.com> To: ak@suse.de Cc: sim@netnation.com, linux-kernel@vger.kernel.org, linux-net@vger.kernel.org Subject: Re: Longstanding networking / SMP issue? (duplextest) From: "David S. Miller" In-Reply-To: References: <20030219174757.GA5373@netnation.com.suse.lists.linux.kernel> X-FalunGong: Information control. X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 574 Lines: 14 From: Andi Kleen Date: 20 Feb 2003 08:52:46 +0100 That's probably because of the lazy ICMP socket locking used for the ICMP socket. When an ICMP is already in process the next ICMP triggered from a softirq (e.g. ECHO-REQUEST) is dropped (see net/ipv4/icmp_xmit_lock_bh()) Good spotting Andi. - 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/