From owner-freebsd-current@FreeBSD.ORG Fri Apr 4 00:01:06 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4355E37B401 for ; Fri, 4 Apr 2003 00:01:06 -0800 (PST) Received: from rootlabs.com (root.org [67.118.192.226]) by mx1.FreeBSD.org (Postfix) with SMTP id D8A9843F3F for ; Fri, 4 Apr 2003 00:01:05 -0800 (PST) (envelope-from nate@rootlabs.com) Received: (qmail 15825 invoked by uid 1000); 4 Apr 2003 08:01:08 -0000 Date: Fri, 4 Apr 2003 00:01:08 -0800 (PST) From: Nate Lawson To: current@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: MPSAFE fxp m_pkthdr not valid X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Apr 2003 08:01:06 -0000 I have gotten fxp running with MPSAFE and did a large scp transfer. It ran for a few minutes and then paniced. It was trap 12 (page fault) at address 0x24. Here is where it crashed: fxp_start+0xcc 0xc0194a4c is in fxp_start (../../../dev/fxp/if_fxp.c:1263). 1258 * been computed and stored in the checksum field 1259 * in the TCP header. The stack should have 1260 * already done this for us. 1261 */ 1262 1263 if (mb_head->m_pkthdr.csum_flags) { 1264 if (mb_head->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { 1265 txp->tx_cb->ipcb_ip_activation_high = 1266 FXP_IPCB_HARDWAREPARSING_ENABLE; 1267 txp->tx_cb->ipcb_ip_schedule = The deref of mb_head->m_pkthdr is invalid. Note that my fxp_intr function acquires the fxp lock right away so this shouldn't be a race in fxp. There is still the slab_zalloc LOR which I will describe further in another email. -Nate