Daniel Lezcano wrote:
> Oh, by the way, I forgot something important you spotted with the list 
> protected by the mutex.
> 
> When looking at ipv6/fib_hash.c with Benjamin, we need to browse the 
> network namespaces list for the garbage collecting, but we are in an 
> interrupt handler, so I can not use rtnl_lock.
where exactly....

all interesting places are called under rtnl already...

> Why is not possible to protect the list with a simple spinlock ? so we 
> can call spin_lock_bh when we are in interrupt handler.

see my old patch with a locking rules :)

By the way, I have forgotten to mention, that the original patch works 
from 2004 for OpenVz :)

Regards,
	Den