It looks similar. WARNING: at net/ipv4/tcp_input.c:2213 tcp_mark_head_lost+0x15c/0x164() Modules linked in: i2c_nforce2 Pid: 0, comm: swapper Not tainted 2.6.26-rc8-00089-ge1441b9-dirty #1 [<c0119f15>] warn_on_slowpath+0x41/0x7b [<c01348dc>] ? mark_held_locks+0x4e/0x66 [<c011e518>] ? local_bh_enable+0xcf/0xe6 [<c0134a50>] ? trace_hardirqs_on+0xd0/0x10d [<c031f8c5>] ? dev_queue_xmit+0x2cd/0x300 [<c0336968>] ? ip_finish_output+0x20c/0x244 [<c0336a06>] ? ip_output+0x66/0x6a [<c0135b9e>] ? __lock_acquire+0xc26/0xc35 [<c033e5e1>] tcp_mark_head_lost+0x15c/0x164 [<c034064c>] tcp_ack+0x14ff/0x1760 [<c0342ffa>] tcp_rcv_established+0xdc/0x96a [<c0348807>] tcp_v4_do_rcv+0x25/0x14e [<c0383159>] ? _spin_lock_nested+0x4f/0x57 [<c0348c2a>] tcp_v4_rcv+0x2fa/0x492 [<c0332b42>] ip_local_deliver+0x7d/0xcd [<c0332a9e>] ip_rcv+0x352/0x379 [<c012c918>] ? ktime_get_real+0x13/0x2f [<c031eecb>] netif_receive_skb+0x1ec/0x21a [<c032a9d4>] ? eth_type_trans+0x28/0xc7 [<c02e3a2e>] nv_napi_poll+0x1fa/0x618 [<c0134a50>] ? trace_hardirqs_on+0xd0/0x10d [<c031df80>] net_rx_action+0x8b/0x14e [<c011e60b>] __do_softirq+0x54/0xa1 [<c013fc13>] ? handle_fasteoi_irq+0x0/0xab [<c010494f>] do_softirq+0x57/0xa6 [<c011e201>] irq_exit+0x3b/0x7c [<c0104b18>] do_IRQ+0xca/0xe2 [<c0101d2a>] ? default_idle+0x0/0x4e [<c0101d2a>] ? default_idle+0x0/0x4e [<c0103712>] common_interrupt+0x2e/0x34 [<c0101d2a>] ? default_idle+0x0/0x4e [<c0101d2a>] ? default_idle+0x0/0x4e [<c0101d57>] ? default_idle+0x2d/0x4e [<c0101cfd>] cpu_idle+0x62/0x8f [<c0375c81>] rest_init+0x61/0x63 ======================= ---[ end trace 458274215148af5e ]--- You are right, I have no idea how to reproduce it. I have two events, once per month. -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html