[cgl_discussion] Re: alternate event logging proposal

[Jeff Garzik]

Brad Hards wrote:
> I liked the /sbin/hotplug arrangement (aka call_usermode_helper). In fact, my 
> plan was to add the call_usermode_helper call to the netif_carrier_[on,off] 
> functions. Unfortuantely, I've been to too many of Rusty's talks, and know 
> that calling a function that is only safe in user context is unlikely to be a 
> good idea in netif_carrier_[on,off], which are more than likely running in 
> interrupt context.


You really want something where a userspace app can sleep on an fd, to 
be awakened when link changes (or some other interesting event occurs)

	Jeff