On Fri, 20 Apr 2007 14:27:06 +0900, Tejun Heo <[EMAIL PROTECTED]> wrote:
> Hello, Alan. > > Alan Stern wrote: > > This doesn't solve a related problem: a subsystem wants to register > > devices and to provide a set of mutually-exclusive services to the > > devices' drivers. The mutual exclusion has to be provided by a mutex or > > something similar, and the drivers need a way to unbind even while waiting > > to acquire the mutex. > > I don't really follow why the drivers need a way to unbind even while > waiting to acquire the mutex. Care to enlighten me? I guess when the driver is just being ripped out or an unbind has been triggered or similar. > Yeah, exactly. My argument is that that impedance matching between > lifetime rules must happen at some place and it's better if we can do in > the higher layer where we can afford more effort and thus complexity. > We're currently pushing that down to each drivers and not too many are > getting it right. I think it's just unrealistic to expect every and > each driver subsystems to get it right, so some overhead at higher layer > is acceptable and we can definitely afford much more optimization at > higher layer. I agree. It isn't easy to get this right, so just we should just solve that once for all drivers. - 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/
