node should be deleted normally only when no processes left.
it's possible to fix syscall to return an error when node is non-empty...


Dietmar Maurer wrote:
>  
>> check vzctl sources. it calls other OVZ-specific syscalls by 
>> their numbers, like sys_setluid, sys_setublimit etc.
>>
>> For creating fairsched node you'll need to call 
>> fairsched_mknod first, then move the process to this node 
>> using fairsched_mvpr
> 
> OK, I wrote a small (perl) script to test those syscalls, and everything
> work as expected, for example:
> 
> ..
> fairsched_mknod (0, 500, 400);
> fairsched_vcpus (400, 1);
> set_cpulimit (400, 25);
> fairsched_mvpr ($$, 400);
> fork_and_do_something(); # runs with 25% cpu
> wait
> fairsched_rmnod (400);
> ..
> 
> work perfectly.
> 
> But when I call fairsched_rmnod(400) from another process while there is
> still a process running inside 400 the system freezes. I get a kernel
> panic somewhere inside move_task_off_dead_cpu.
> 
> any idea how to fix that?
> 
> - Dietmar
> 
> 
> 
> 
>