Re: [uml-devel] negative pid -516 possible ?

["Toralf Förster" <toralf.foerster@gmx.de>]

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On 12/21/2013 03:36 PM, Toralf Förster wrote:
> Trinity'ing a 32 bit linux user mode linux (still the raid x tree issue ....) gives for a guest :
> 
> tfoerste@n22 ~ $ date; sudo gdb /home/tfoerste/devel/linux/linux 10044 -n -batch -ex 'bt full'
> Sat Dec 21 15:33:03 CET 2013
> 0xb7710424 in __kernel_vsyscall ()
> #0  0xb7710424 in __kernel_vsyscall ()
> No symbol table info available.
> #1  0x083d5d2f in __nanosleep_nocancel ()
> No symbol table info available.
> #2  0x0807267c in idle_sleep (nsecs=602496466104653440) at arch/um/os-Linux/time.c:183
>         ts = {tv_sec = 0, tv_nsec = 6471789}
> #3  0x0805fc0f in arch_cpu_idle () at arch/um/kernel/process.c:208
> No locals.
> #4  0x080a8981 in cpu_idle_loop () at kernel/cpu/idle.c:98
> No locals.
> #5  cpu_startup_entry (state=CPUHP_ONLINE) at kernel/cpu/idle.c:140
> No locals.
> #6  0x08421d02 in rest_init () at init/main.c:401
>         pid = -516
> #7  0x080487e1 in start_kernel () at init/main.c:655
>         command_line = 0x85b6400 <command_line> "earlyprintk ubda=/home/tfoerste/virtual/uml/trinity ubdb=/mnt/ramdisk/trinity_swap eth0=tuntap,tap0,72:ef:3d:9f:c3:5a mem=1025M con0=fd:0,fd:1 con=pts rootfstype=ext4  root=98:0"
> #8  0x08049e09 in start_kernel_proc (unused=0x0) at arch/um/kernel/skas/process.c:46
>         pid = -516
> #9  0x0805f7cb in new_thread_handler () at arch/um/kernel/process.c:129
>         fn = 0x0
> #10 0x00000000 in ?? ()
> No symbol table info available.
> 
> 
> Is this a valid number ?
> 
> 

I'm asking b/c there's no process group id 516, and -516 always happens in the back traces.
And furthermore after a while the UML system does no longer serve any ssh login attempts.

- -- 
MfG/Sincerely
Toralf Förster
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