[cgl_discussion] Re: alternate event logging proposal

Jeff Garzik jgarzik at pobox.com
Tue Sep 24 16:31:31 PDT 2002

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)


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