Unkillable process in STOP state

[Henry Hu]

On Wed, Nov 11, 2015 at 7:12 PM, Slawa Olhovchenkov <slw at zxy.spb.ru> wrote:

> I have amd64, STABLE r288167.
>
> root at edge09:/home/admin # procstat -k -k 627
>   PID    TID COMM             TDNAME           KSTACK
>   627 100167 tcpkali.new      -                mi_switch+0xe1
> thread_suspend_switch+0x170 thread_single+0x4e5 exit1+0xbe sys_sys_exit+0xe
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100172 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100173 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100174 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100175 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100178 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 100180 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 102207 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 102208 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 102209 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
>   627 102211 tcpkali.new      -                mi_switch+0xe1
> sleepq_timedwait_sig+0x8b _sleep+0x238 kern_kevent+0x401 sys_kevent+0x12a
> amd64_syscall+0x357 Xfast_syscall+0xfb
> root at edge09:/home/admin # procstat -t 627
>   PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
>   627 100167 tcpkali.new      -                 10  120 stop    -
>   627 100172 tcpkali.new      -                  3  152 stop    -
>   627 100173 tcpkali.new      -                  5  152 stop    -
>   627 100174 tcpkali.new      -                  3  152 stop    -
>   627 100175 tcpkali.new      -                  2  149 stop    -
>   627 100178 tcpkali.new      -                  5  152 stop    -
>   627 100180 tcpkali.new      -                  2  132 stop    -
>   627 102207 tcpkali.new      -                  5  136 stop    -
>   627 102208 tcpkali.new      -                  3  152 stop    -
>   627 102209 tcpkali.new      -                  5  139 stop    -
>   627 102211 tcpkali.new      -                  1  120 stop    -
>
> kill -STOP don't have effect.
>

Does kill -CONT work?


> gdb can't be attached.
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-- 
Cheers,
Henry