bad: scheduling while atomic!

[atarimike at charter.net]

I'm running Fedora Core 1 with a custom 2.6.2 kernel. 
After a while (vaires from days to minutes), I get this 
message in  
my /var/log/messagse file: 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel: bad: 
scheduling while atomic! 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel: Call Trace: 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c011eb79>]  
schedule+0x69a/0x69f 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c011904f>]  
smp_apic_timer_interrupt+0xdd/0x145 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c0109d86>]  
reschedule_interrupt+0x1a/0x20 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c010701e>]  
default_idle+0x0/0x2c 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c01070b7>] 
cpu_idle+0x3a/0x3c 
Feb 16 02:37:50 d182-100-tercero-k-1 kernel:  [<c01239c0>] 
printk+0x163/0x1be 
 
This is repeated over and over, many many times a second. 
The only way to make  
it stop is to reboot. I have Dell comptuer with a P4 and 
hyperthreading.  
What's going on here? 
 
Mike 
ps. I'm not sure if this is an appropriate question here, 
but I'm not sure  
where else to ask.