Re: [uml-devel] problem about SMP simulation

[Rainbow W. <q....@ma...>]

If I sucessfully boot SMP-UML (16-processor), then I try to halt the 
UML. All the processes on the host were killed such as tracing thread,
idle thread 0, kernel threads and other threads. But idle thread 1-15 
were still running on the host. Then I attach gdb ot them, I can see

#0  0xa011d761 in __libc_nanosleep ()
#1  0xa00f8ddd in idle_sleep (secs=10) at time.c:111
#2  0xa00fc665 in cpu_idle () at process_kern.c:424
#3  0xa00f6a33 in idle_proc (unused=0x0) at smp.c:128
#4  0xa00f5499 in run_kernel_thread (fn=0xa00f6850 <idle_proc>, arg=0x0,
    jmp_ptr=0xa08a43c0) at process.c:246
#5  0xa00fbeef in new_thread_handler (sig=10) at process_kern.c:142
#6  <signal handler called>
#7  0xa0109cf1 in __kill ()
#8  0x00000001 in ?? ()

What's wrong with them? Does it mean that they were not ptraced by tracing 
thread ?

Thanks,
Qing


> qi...@ho... said:
> > What does it mean making the UML architecture layer SMP safe? Could
> > any one give me an example?
> 
> It looks like you need to read the kernel locking guide.  Go into 
> Documentation/DocBook and run make.  Then read whichever version of 
> kernel-locking.* you prefer.
> 
>     Jeff
> 
> 
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