Re: kernel panic when stop my test demo

[Lilijun <jerry.lilijun-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>]

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