David S. Miller wrote:
> On Wed, 7 Jul 2004 09:35:10 +0200
> Ingo Molnar <mingo@elte.hu> wrote:
> 
> 
>>the patch below should solve this. Is it safe on sparc to do a
>>fork_by_hand() like this?
> 
> 
> If the regs are garbage, copy_thread() will explode as it tries
> to interpret the stack pointer in that regs value.
> 
> The parent's regs (stored in current_thread_info() at trap time,
> and also needed by copy_thread() processing) will also be garbage
> since we're avoiding the fork syscall trap.
> 
> In short, this won't work :)
> 
> This is why I use kernel_thread().  Why is that so bad?
> 

We could make CLONE_IDLETASK clones not do the wakeup?

Ingo? I guess an alternative is to have the arch explicitly
make a call to dequeue it.