From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yann Dupont Subject: skb_warn_bad_offload with kernel 3.5 (maybe gso/bridge related ?) Date: Fri, 03 Aug 2012 10:10:58 +0200 Message-ID: <501B8792.6040605@univ-nantes.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE To: "netdev@vger.kernel.org" Return-path: Received: from smtptls1-loi.cpub.univ-nantes.fr ([193.52.103.112]:48214 "EHLO smtp-tls.univ-nantes.fr" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751987Ab2HCIUz (ORCPT ); Fri, 3 Aug 2012 04:20:55 -0400 Received: from localhost (localhost [127.0.0.1]) by smtp-tls.univ-nantes.fr (Postfix) with ESMTP id CD31943A06F for ; Fri, 3 Aug 2012 10:11:02 +0200 (CEST) Received: from smtp-tls.univ-nantes.fr ([127.0.0.1]) by localhost (smtptls1-loi.cpub.univ-nantes.fr [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 6XsxmgmAlXKR for ; Fri, 3 Aug 2012 10:10:58 +0200 (CEST) Received: from [IPv6:2001:660:7220:0:8020:f15a:e55f:984e] (unknown [IPv6:2001:660:7220:0:8020:f15a:e55f:984e]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp-tls.univ-nantes.fr (Postfix) with ESMTPSA id C39CF43A041 for ; Fri, 3 Aug 2012 10:10:58 +0200 (CEST) Sender: netdev-owner@vger.kernel.org List-ID: Hello everybody, I have a machine using ceph rbd volume, as a client (rbd module) to=20 backup data. I was running kernel 3.2.22 ok. Tried 3.5.0 because some rbd fixes went= in. Now, shortly after the start, my logs are filled by that : Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.780860]=20 WARNING: at net/core/dev.c:1888 skb_warn_bad_offload+0xb6/0xc1() Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.780920]=20 Hardware name: PowerEdge M605 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.780990] = :=20 caps=3D(0x0000000000005000, 0x0000000000000000) len=3D7292 data_len=3D5= 792=20 gso_size=3D1448 gso_type=3D1 ip_summed=3D1 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.781071]=20 Modules linked in: rbd libceph ipt_MASQUERADE iptable_nat nf_nat=20 ipt_REJECT veth fuse xt_physdev xt_iprange xt_multiport ip6table_filter= =20 ip6_tables xt_LOG xt_limit xt_tcpudp xt_state iptable_filter ip_tables=20 x_tables nf_conntrack_tftp nf_conntrack_ftp nf_conntrack_ipv4=20 nf_defrag_ipv4 8021q bridge stp llc ext2 mbcache dm_round_robin=20 dm_multipath scsi_dh nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ipv6= =20 powernow_k8 freq_table mperf kvm_amd snd_pcm kvm snd_timer snd soundcor= e=20 snd_page_alloc tpm_tis tpm tpm_bios pcspkr evdev psmouse microcode=20 joydev dcdbas shpchp i2c_nforce2 pci_hotplug serio_raw processor=20 i2c_core hid_generic thermal_sys hed button xfs exportfs dm_mod ses=20 enclosure usbhid hid sg sr_mod sd_mod cdrom usb_storage lpfc=20 scsi_transport_fc scsi_tgt ohci_hcd bnx2x mptsas mptscsih bnx2 mptbase=20 scsi_transport_sas crc32c scsi_mod libcrc32c mdio ehci_hcd [last=20 unloaded: scsi_wait_scan] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.785995]=20 Pid: 0, comm: swapper/0 Not tainted 3.5.0-dsiun-120521 #5 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786055]=20 Call Trace: Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786108] = =20 [] ? skb_warn_bad_offload+0x6f/0xc1 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786209] = =20 [] ? warn_slowpath_common+0x79/0xc0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786269] = =20 [] ? warn_slowpath_fmt+0x45/0x50 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786330] = =20 [] ? get_nohz_timer_target+0x57/0xd0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786390] = =20 [] ? skb_warn_bad_offload+0xb6/0xc1 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786452] = =20 [] ? skb_gso_segment+0x207/0x280 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786512] = =20 [] ? dev_hard_start_xmit+0x1f6/0x620 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786574] = =20 [] ? sch_direct_xmit+0xfd/0x1d0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786633] = =20 [] ? dev_queue_xmit+0x454/0x610 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786697] = =20 [] ? br_dev_queue_push_xmit+0x72/0xc0 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786762] = =20 [] ? br_nf_post_routing+0x223/0x340 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786825] = =20 [] ? nf_iterate+0x84/0xa0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786885] = =20 [] ? deliver_clone+0x60/0x60 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.786945] = =20 [] ? nf_hook_slow+0x6e/0x130 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787005] = =20 [] ? deliver_clone+0x60/0x60 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787067] = =20 [] ? br_multicast_flood+0x170/0x170 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787130] = =20 [] ? br_forward_finish+0x42/0x50 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787193] = =20 [] ? br_nf_forward_finish+0xb9/0x180 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787256] = =20 [] ? br_nf_forward_ip+0x291/0x3d0 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787318] = =20 [] ? nf_iterate+0x84/0xa0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787379] = =20 [] ? tcp_packet+0x82f/0xf10 [nf_conntrack] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787442] = =20 [] ? br_multicast_flood+0x170/0x170 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787503] = =20 [] ? nf_hook_slow+0x6e/0x130 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787563] = =20 [] ? br_multicast_flood+0x170/0x170 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787626] = =20 [] ? __br_forward+0x90/0xb0 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787688] = =20 [] ? br_handle_frame_finish+0x214/0x2b0 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787765] = =20 [] ? br_nf_pre_routing_finish+0x19b/0x340 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787842] = =20 [] ? br_nf_pre_routing+0x3a2/0x650 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787904] = =20 [] ? generic_exec_single+0xb4/0xc0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.787964] = =20 [] ? nf_iterate+0x84/0xa0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788025] = =20 [] ? br_handle_local_finish+0x50/0x50 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788087] = =20 [] ? nf_hook_slow+0x6e/0x130 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788147] = =20 [] ? br_handle_local_finish+0x50/0x50 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788210] = =20 [] ? br_handle_frame+0x1c8/0x260 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788273] = =20 [] ? br_handle_frame_finish+0x2b0/0x2b0 [bridge] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788348] = =20 [] ? __netif_receive_skb+0x418/0x5a0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788409] = =20 [] ? ipt_do_table+0x344/0x5e0 [ip_tables] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788470] = =20 [] ? netif_receive_skb+0x1a/0x80 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788530] = =20 [] ? napi_skb_finish+0x50/0x70 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788599] = =20 [] ? bnx2x_rx_int+0x656/0x13d0 [bnx2x] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788671] = =20 [] ? lpfc_sli_handle_fast_ring_event+0x26e/0x5d0 [lpf= c] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788748] = =20 [] ? ipv4_confirm+0x175/0x200 [nf_conntrack_ipv4] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788828] = =20 [] ? bnx2x_poll+0x93/0x2b0 [bnx2x] Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788889] = =20 [] ? net_rx_action+0x138/0x220 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.788949] = =20 [] ? __do_softirq+0xae/0x1c0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789009] = =20 [] ? call_softirq+0x1c/0x30 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789068] = =20 [] ? do_softirq+0x75/0xb0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789127] = =20 [] ? irq_exit+0xa5/0xb0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789185] = =20 [] ? do_IRQ+0x5b/0xd0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789243] = =20 [] ? common_interrupt+0x6a/0x6a Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789301] = =20 [] ? get_next_timer_interrupt+0x1e1/0x280 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789414] = =20 [] ? native_safe_halt+0x2/0x10 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789474] = =20 [] ? default_idle+0x47/0x190 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789533] = =20 [] ? amd_e400_idle+0x50/0x110 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789593] = =20 [] ? cpu_idle+0xb6/0xd0 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789651] = =20 [] ? start_kernel+0x366/0x371 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789711] = =20 [] ? repair_env_string+0x5b/0x5b Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789771] = =20 [] ? x86_64_start_kernel+0x105/0x114 Jul 31 18:15:01 singleton.u06.univ-nantes.prive kernel: [ 1175.789831]=20 ---[ end trace ad41e3fec21667dd ]--- Shorter traces : Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537129]=20 WARNING: at net/core/dev.c:1888 skb_warn_bad_offload+0xb6/0xc1() Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537156]=20 Hardware name: PowerEdge M605 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537178] = :=20 caps=3D(0x0000000000005000, 0x0000000000000000) len=3D23220 data_len=3D= 21720=20 gso_size=3D1448 gso_type=3D1 ip_summed=3D1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537226]=20 Modules linked in: rbd libceph ipt_MASQUERADE iptable_nat nf_nat=20 ipt_REJECT veth fuse xt_physdev xt_iprange xt_multiport ip6table_filter= =20 ip6_tables xt_LOG xt_limit xt_tcpudp xt_state iptable_filter ip_tables=20 x_tables nf_conntrack_tftp nf_conntrack_ftp nf_conntrack_ipv4=20 nf_defrag_ipv4 8021q bridge stp llc ext2 mbcache dm_round_robin=20 dm_multipath scsi_dh nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ipv6= =20 powernow_k8 freq_table mperf kvm_amd snd_pcm kvm snd_timer snd soundcor= e=20 snd_page_alloc tpm_tis tpm tpm_bios pcspkr evdev psmouse microcode=20 joydev dcdbas shpchp i2c_nforce2 pci_hotplug serio_raw processor=20 i2c_core hid_generic thermal_sys hed button xfs exportfs dm_mod ses=20 enclosure usbhid hid sg sr_mod sd_mod cdrom usb_storage lpfc=20 scsi_transport_fc scsi_tgt ohci_hcd bnx2x mptsas mptscsih bnx2 mptbase=20 scsi_transport_sas crc32c scsi_mod libcrc32c mdio ehci_hcd [last=20 unloaded: scsi_wait_scan] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537632]=20 Pid: 22553, comm: smtp Tainted: G W 3.5.0-dsiun-120521 #5 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537673]=20 Call Trace: Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537691] = =20 [] ? skb_warn_bad_offload+0x6f/0xc1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537720] = =20 [] ? warn_slowpath_common+0x79/0xc0 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537747] = =20 [] ? warn_slowpath_fmt+0x45/0x50 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537773] = =20 [] ? skb_warn_bad_offload+0xb6/0xc1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537800] = =20 [] ? skb_gso_segment+0x207/0x280 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537826] = =20 [] ? dev_hard_start_xmit+0x1f6/0x620 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537853] = =20 [] ? sch_direct_xmit+0xfd/0x1d0 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537879] = =20 [] ? dev_queue_xmit+0x454/0x610 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537907] = =20 [] ? br_dev_queue_push_xmit+0x72/0xc0 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.537937] = =20 [] ? br_nf_post_routing+0x223/0x340 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.538103] = =20 [] ? br_forward_finish+0x42/0x50 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.538132] = =20 [] ? br_nf_forward_finish+0xb9/0x180 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.538704] = =20 [] ? netif_receive_skb+0x1a/0x80 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539024] = =20 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539162] = :=20 caps=3D(0x0000000000005000, 0x0000000000000000) len=3D6250 data_len=3D4= 750=20 gso_size=3D1448 gso_type=3D1 ip_summed=3D1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539209]=20 Modules linked in: rbd libceph ipt_MASQUERADE iptable_nat nf_nat=20 ipt_REJECT veth fuse xt_physdev xt_iprange xt_multiport ip6table_filter= =20 ip6_tables xt_LOG xt_limit xt_tcpudp xt_state iptable_filter ip_tables=20 x_tables nf_conntrack_tftp nf_conntrack_ftp nf_conntrack_ipv4=20 nf_defrag_ipv4 8021q bridge stp llc ext2 mbcache dm_round_robin=20 dm_multipath scsi_dh nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ipv6= =20 powernow_k8 freq_table mperf kvm_amd snd_pcm kvm snd_timer snd soundcor= e=20 snd_page_alloc tpm_tis tpm tpm_bios pcspkr evdev psmouse microcode=20 joydev dcdbas shpchp i2c_nforce2 pci_hotplug serio_raw processor=20 i2c_core hid_generic thermal_sys hed button xfs exportfs dm_mod ses=20 enclosure usbhid hid sg sr_mod sd_mod cdrom usb_storage lpfc=20 scsi_transport_fc scsi_tgt ohci_hcd bnx2x mptsas mptscsih bnx2 mptbase=20 scsi_transport_sas crc32c scsi_mod libcrc32c mdio ehci_hcd [last=20 unloaded: scsi_wait_scan] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539614]=20 Pid: 22553, comm: smtp Tainted: G W 3.5.0-dsiun-120521 #5 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539654]=20 Call Trace: Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539673] = =20 [] ? skb_warn_bad_offload+0x6f/0xc1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539702] = =20 [] ? warn_slowpath_common+0x79/0xc0 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539728] = =20 [] ? warn_slowpath_fmt+0x45/0x50 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539755] = =20 [] ? skb_warn_bad_offload+0xb6/0xc1 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539782] = =20 [] ? skb_gso_segment+0x207/0x280 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.539808] = =20 [] ? dev_hard_start_xmit+0x1f6/0x620 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.540933] = =20 [] ? irq_exit+0xa5/0xb0 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543067] = =20 [] ? dev_queue_xmit+0x454/0x610 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543095] = =20 [] ? br_dev_queue_push_xmit+0x72/0xc0 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543125] = =20 [] ? br_nf_post_routing+0x223/0x340 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543514] = =20 [] ? __br_forward+0x90/0xb0 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543585] = =20 [] ? br_nf_pre_routing_finish+0x19b/0x340 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543629] = =20 [] ? br_nf_pre_routing+0x3a2/0x650 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543657] = =20 [] ? nf_iterate+0x84/0xa0 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543684] = =20 [] ? br_handle_local_finish+0x50/0x50 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543712] = =20 [] ? nf_hook_slow+0x6e/0x130 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543739] = =20 [] ? br_handle_local_finish+0x50/0x50 [bridge] Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543767] = =20 [] ? nf_hook_slow+0x6e/0x130 Aug 1 14:37:41 singleton.u06.univ-nantes.prive kernel: [74424.543795] = =20 [] ? br_handle_frame+0x1c8/0x260 [bridge] Despite thoses messages, the machine is still running OK. It runs lxc=20 instances (and so , bridge & tun/tap), only one of thoses instances use= s=20 rbd. I don't think the problem is ceph related. This machine have bnx2 (Gb) & bnx2x (10Gb) - Lots of trafic is using=20 bnx2x-. I'm running 3.5.0 on other hosts (bnx2/bnx2x or ixgbe drivers) without=20 problems. But it's not the same workload. As the problem seems more or less gso related, I've deactivated gso two= =20 days ago. This cure the symptom, running ok since. Anyone here seeing this problem ? Cheers, --=20 Yann Dupont - Service IRTS, DSI Universit=E9 de Nantes Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont@univ-nantes.fr