Re: [PATCH 14/21] i386 Apm is on cpu zero only

[Zachary Amsden]

Ingo Molnar wrote:

> * Zachary Amsden <zach@xxxxxxxxxx> wrote:
>
>  
>
> > APM BIOS code has a protective wrapper that runs it only on CPU zero.  
> > Thus, no need to set APM BIOS segments in the GDT for other CPUs.
> >    
>
> hm, do we want (need) to have that CPU#0 assumption forever?
>  

Can't hurt, and APM is largely obsolete because of ACPI, so I'm only 
concerned with trimming and keeping adequate protection of the kernel 
from APM code while maintaining correctness.  I don't have a nice set of 
old machines with enough wacky APM BIOSen to validate that unpinning the 
CPU is ok.

Zach
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/