On 05.11.2016 23:38, Gabriel C wrote:
Hello ,
I've tested 4.9-rcX and Linus git tree and have on this box the following
messages :
.....
Nov 05 20:26:40 zwerg kernel: INFO: rcu_preempt detected stalls on CPUs/tasks:
Nov 05 20:26:40 zwerg kernel: Tasks blocked on level-0 rcu_node (CPUs
0-15): P0
Nov 05 20:26:40 zwerg kernel: (detected by 8, t=60002 jiffies, g=2426,
c=2425, q=789)
Nov 05 20:26:40 zwerg kernel: swapper/0 R running task 0 0
0 0x00200000
Nov 05 20:26:40 zwerg kernel: 0000000000000000 ffff88043fc0c6c0
ffffffff810ca25e 0000000000000004
Nov 05 20:26:40 zwerg kernel: 0000000000000002 0000000000000003
0000000000000010 ffffffff814b936f
Nov 05 20:26:40 zwerg kernel: ffff88043fc1d600 ffffffff81893f00
0000000000000003 ffffffff81893de0
Nov 05 20:26:40 zwerg kernel: Call Trace:
Nov 05 20:26:40 zwerg kernel: [<ffffffff810ca25e>] ?
__tick_broadcast_oneshot_control+0x5e/0x220
Nov 05 20:26:40 zwerg kernel: [<ffffffff814b936f>] ? intel_idle+0xef/0xfe
Nov 05 20:26:40 zwerg kernel: [<ffffffff813d3b45>] ?
cpuidle_enter_state+0x125/0x200
Nov 05 20:26:40 zwerg kernel: [<ffffffff81096e0f>] ?
cpu_startup_entry+0x13f/0x230
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9e69>] ? start_kernel+0x428/0x430
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9120>] ?
early_idt_handler_array+0x120/0x120
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e937a>] ?
x86_64_start_kernel+0xef/0xfe
Nov 05 20:26:40 zwerg kernel: swapper/0 R running task 0 0
0 0x00200000
Nov 05 20:26:40 zwerg kernel: 0000000000000000 ffff88043fc0c6c0
ffffffff810ca25e 0000000000000004
Nov 05 20:26:40 zwerg kernel: 0000000000000002 0000000000000003
0000000000000010 ffffffff814b936f
Nov 05 20:26:40 zwerg kernel: ffff88043fc1d600 ffffffff81893f00
0000000000000003 ffffffff81893de0
Nov 05 20:26:40 zwerg kernel: Call Trace:
Nov 05 20:26:40 zwerg kernel: [<ffffffff810ca25e>] ?
__tick_broadcast_oneshot_control+0x5e/0x220
Nov 05 20:26:40 zwerg kernel: [<ffffffff814b936f>] ? intel_idle+0xef/0xfe
Nov 05 20:26:40 zwerg kernel: [<ffffffff813d3b45>] ?
cpuidle_enter_state+0x125/0x200
Nov 05 20:26:40 zwerg kernel: [<ffffffff81096e0f>] ?
cpu_startup_entry+0x13f/0x230
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9e69>] ? start_kernel+0x428/0x430
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9120>] ?
early_idt_handler_array+0x120/0x120
Nov 05 20:26:40 zwerg kernel: [<ffffffff818e937a>] ?
x86_64_start_kernel+0xef/0xfe
.....
When I boot to console mode the system seems to work at least when I'm loggen
in from tty1.
Switching to other tty's sometimes works sometimes not.. Starting X makes the
box hang.. sddm starts but I
never get to the logn screen. After some minutes I have to hard reset the box..
Latest tested git kernel is 4.9.0-rc3-00429-g03daa36 , the box is a FUJITSU
PRIMERGY TX200 S5.
config used and dmesg can be found there :
http://ftp.frugalware.org/pub/other/people/crazy/kernel/
Best Regards
Gabriel C
Hi,
i'm witnessing stalls as well (with different stack traces though: [1],
[2], [3], [4]). Silly enough this seems to happen _only_ at my
university with wifi enabled (works fine with older kernels: tested
4.8.4 and older ones as they were recent).
Best Regards,
Tobias Klausmann
[1]: https://homepages.thm.de/~tjkl80/dmesg4.txt
[2]: https://homepages.thm.de/~tjkl80/dmesg3.txt
[3]: https://homepages.thm.de/~tjkl80/dmesg2.txt
[4]: https://homepages.thm.de/~tjkl80/dmesg.txt
