[LAU] 2.6.21-rt7 Oopses, More

[David Baron]

>Ran for nearly two hours with none. Nada.

>Then they started up again. What triggered them?

>The only thing in the logcheck at the same time as the first outputs was a 
>pptp connect after the original connection fell. Relevant?

The offending functions are icmp_.... functions, most likely the more used 
ipv4 flavor of icmp.c.

Example:
BUG: using smp_processor_id() in preemptible [00000000] code: IRQ-9/1110
caller is icmp_xmit_unlock+0xb/0x30
 [<c01faab9>] debug_smp_processor_id+0xa9/0xb0
 [<c02e531b>] icmp_xmit_unlock+0xb/0x30
 [<c02e598e>] icmp_send+0x11e/0x3f0
....