Hi Stephen and all, I have a same problem as this older email describes on Aug 14, 2013. Any help will be appreciated.
The details is shown as follows. The key step implementation of my demo is: 1. Firstly, call rte_eal_init() to do some initialization. 2. Switch the driver of my Intel 82599 NIC from ixgbe.ko to igb_uio.ko like tools/dpdk_nic_bind.py written in C source code. 3. Configure rte_dev and start it. 4. Do some rx/tx tests. 5. call rte_eth_dev_stop(dpdk_port_id) to stop the hardware as your history emails. 6. Switch the driver of the NIC from igb_uio.ko to ixgbe.ko. 7. Kill the demo using commands: kill -9. Then kernel panics at random points when do something later. One of them as follows: general protection fault: 0000 [#1] SMP Modules linked in: tun igb_uio(OF) uio mlx4_ib ib_sa task: ffff881fd0d6a220 ti: ffff881fd0cf8000 task.ti: ffff881fd0cf8000 RIP: 0010:[<ffffffff8183d85f>] [<ffffffff8183d85f>] dcbnl_rtnl_policy+0x1b111f/0x1e3f70 RSP: 0000:ffff881fd0cf9c38 EFLAGS: 00013282 RAX: ffffffff819770a0 RBX: ffff881fe7b49fa0 RCX: 0000000000000001 RDX: ffffffff8183d851 RSI: ffff881fe7f20da1 RDI: ffffffff819770a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffff881fe7f20da0 R11: ffff881fd0da0310 R12: ffff881fe811e6c0 R13: 0000000000000000 R14: ffff881fe6d14180 R15: ffff881fe7af4a20 FS: 0000000000000000(0000) GS:ffff88203fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f2702d3f9e0 CR3: 00000000018ce000 CR4: 00000000000007e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Stack: ffffffffa0235524 ffff881fd0da0300 0000000000000008 ffff881fe7f20da0 ffff881fd0cf9ca0 ffffffff811b1329 ffff881fe7f20da0 ffff881fd0da0310 ffff881fd0da0200 ffffffff81c9be80 ffff881fd0d6a9f0 ffff881fd0d6a220 Call Trace: [<ffffffffa0235524>] ? uio_release+0x34/0x60 [uio] [<ffffffff811b1329>] ? __fput+0xe9/0x270 [<ffffffff811b15fe>] ? ____fput+0xe/0x10 [<ffffffff810823e4>] ? task_work_run+0xc4/0xe0 [<ffffffff81063deb>] ? do_exit+0x2cb/0xa60 [<ffffffff815e965b>] ? _raw_spin_unlock_irqrestore+0x1b/0x40 [<ffffffff810645ff>] ? do_group_exit+0x3f/0xa0 [<ffffffff81074010>] ? get_signal_to_deliver+0x1d0/0x6e0 [<ffffffffa0289224>] ? tun_chr_aio_read+0xa4/0xc0 [tun] [<ffffffff81012437>] ? do_signal+0x57/0x600 [<ffffffff815f0ae0>] ? kprobe_flush_task+0xd0/0x170 [<ffffffff81092e3a>] ? finish_task_switch+0x14a/0x170 [<ffffffff81012a49>] ? do_notify_resume+0x69/0xb0 [<ffffffff815e9c7c>] ? retint_signal+0x48/0x8c Thanks, Jerry
