On Mon, Jan 02, 2006 at 11:29:26PM +0000, Andy Burns wrote:
Dave Jones wrote:
>Does acpi=off on the smp kernel make any difference?
acpi=off with the SMP kernel doesn't break it
acpi=off with the UP kernel doesn't mend it
>Any chance you can hook up another pc, and get a serial capture
>of the failing boot ?
Below is the UP log, followed by SMP log for good measure
Incidentally, is it correct that the UP kernel only approximates NX, yet
the SMP kernel makes proper use of NX?
If the CPU has hardware NX support , then the SMP kernel does take
advantage of it, whilst the UP one has to fall back on segment-limit
approach to 'emulate' it. The reason for this is that the SMP
kernel has support for physical address extensions (PAE) (Ie, >4GB RAM)
and NX is dependant on that. The UP kernel doesn't have PAE
because a kernel compiled with that supported doesn't boot on
systems that lack it, (Celerons, early VIA, some mobile Pentium)
Would disabling HT in BIOS affect it?
You tell me :) I can't think of any reason why this has suddenly
broken that would be related to that though.