On Wed, Dec 20, 2006 at 04:34:17PM +0100, Arjan van de Ven wrote: > 5 seconds is unfair and unrealistic though. The *hardware* negotiation > before link is seen can easily take upto 45 seconds already. > That's a network topology/hardware issue (spanning tree fun) that > software or even the hardware in your PC can do nothing about.
It's about ergonomics, not technical capabilities or fairness. > this means that the "power up time" needs to be at least 45 seconds, if > it's then down 5 seconds inbetween... that's not real power savings. Then that means you can't have usable autodetection and power savings at the same time. That's a pefectly acceptable answer, you just have to give the choice between the two to the user. From the kernel p.o.v, it just means that you probably need 3 modes: 1- active and exchanging packets 2- inactive but waiting for plugging and able to tell something is going on fast (like 0.5s fast) 3- powered off and they probably already exist (UP+addr/procmisc. set, UP and DOWN). And if the second mode can't be lower power than the first, that's just life. An hypothetical mode 4 identical to 2 without the "fast" part is just not worth bothering with. OG. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/