On Mon, 15 Oct 2007 16:37:20 +1000 Stephen Rothwell <[EMAIL PROTECTED]> wrote:
> On Sun, 14 Oct 2007 23:23:16 -0700 Andrew Morton <[EMAIL PROTECTED]> wrote: > > > > Also, it's bad that the operator has to provide some special boot > > command-line > > option to make the machine work properly. Please consider this to be a > > bug. Has it always needed apm=power-off? > > It has always been that way because the behaviour of APM on SMP is not > defined. We discovered early that it will work (at least for powering > off) for most SMP machines as long as the APM calls are done on CPU 0. > However on an SMP machine that does not cope, very bad things happen - > thus the operator has to explictly enable the power off behaviour on an > SMP box. (On UP power off is enabled by default.) hrm, OK. But it could have been controlled by a more-user-friendly runtime knob, I guess. Not that it's worth changing that now. - 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/
