om 2.6 Opteron last git, trying to migrate a simple task

Hi,

I am getting at it right now, for a simple test, I am trying to migrate 
a simple task from a node to another node, and it seems not to work at 
all. Instead of migrating the process, it gives me an "Oups" :


When I try to migrate the process using the command:

echo 192.168.169.11 > /proc/7623/om/where

I get this :

|-------------------- OUPS start here : 
----------------------------------------------------------------------------|

Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
<0000000000000000>{stext+2145382632}
PGD 13d667067 PUD 13d6fa067 PMD 0
Oops: 0010 [1] PREEMPT

CPU 0
Modules linked in: thermal processor fan
Pid: 7623, comm: eatcpu Not tainted 2.6.17-om #1
RIP: 0010:[<0000000000000000>] <0000000000000000>{stext+2145382632}
RSP: 0000:ffff81013d7cbef8  EFLAGS: 00010292
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff81013e48b0c0
RDX: 0000000000001000 RSI: 00007fff82c0b670 RDI: ffff81013f6207e0
RBP: 0000000000000000 R08: 0000000000000218 R09: 000000000000fa57
R10: 0000000000000000 R11: ffff81013ead7c00 R12: ffff81013e48b0c0
R13: 00007fff82c0b670 R14: 0000000000000000 R15: 0000000000000000
FS:  00002b4c281f36d0(0000) GS:ffffffff807f9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000013d798000 CR4: 00000000000006e0
Process eatcpu (pid: 7623, threadinfo ffff81013d7ca000, task 
ffff81013f6207e0)
Stack: 0000000a00000009 0000000000000000 0000000000000000 ffffffff8032c87e
       ffff81013f6207e0 ffffffff80329129 0000000000000202 ffffffff803292eb
       ffff81013f6207e0 ffffffff80328c67
Call Trace: <ffffffff8032c87e>{task_move_to_node+41}
       <ffffffff80329129>{task_request_move+40} 
<ffffffff803292eb>{task_do_request+37}
       <ffffffff80328c67>{openmosix_pre_usermode+28} 
<ffffffff8020aa13>{retint_careful+45}

Code:  Bad RIP value.
RIP <0000000000000000>{stext+2145382632} RSP <ffff81013d7cbef8>
CR2: 0000000000000000

|-------------------- OUPS ends here 
----------------------------------------------------------------------------|


The code I am trying to migrate is a simple C program :


int main( int argc, char **argv )
{
        double total = 456114157974121;
        double min = 0;
        double max = total;

        double square = ( min + max ) / 2.0;
        while ( total != square * square )
        {
                if ( (square*square) < total )
                {
                        min = square;
                } else if (square*square > total ) {
                        max = square;
                }
                square = ( min + max ) / 2;

        }
        return 0;
}



Kernel is a 2.6.17 (it gives me the same result with a 2.6.17.8), with 
the preempt kernel option. I will try to get some more interesting 
output, but first, is openmosix preemtive safe ??

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642