Re: [PATCH 2/6] x86: apic - unify lapic_resume

[Cyrill Gorcunov <gorcunov@gmail.com>]

[Arjan van de Ven - Sat, Aug 16, 2008 at 01:00:08PM -0700]
| On Sat, 16 Aug 2008 20:52:07 +0100 (BST)
| "Maciej W. Rozycki" <macro@linux-mips.org> wrote:
| 
| > On Sat, 16 Aug 2008, Cyrill Gorcunov wrote:
| > 
| > > +#ifdef CONFIG_X86_64
| > > +	if (x2apic)
| > > +		enable_x2apic();
| > > +	else
| > > +#endif
| > 
| >  Hmm, x86-64 hardware can run a 32-bit kernel, so it might be a good
| > idea to take the opportunity of the merge and extend x2APIC support
| > to the 32-bit configuration too.  It should be mostly a mechanical
| > change.  Just a suggestion though -- feel free to ignore if you'd
| > rather not dive into it. ;)
| 
| it's not like you can/want to go over 128 cpus on a 32 bit kernel
| though..
| -- 
| If you want to reach me at my work email, use arjan@linux.intel.com
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| visit http://www.lesswatts.org
| 

Arjan,

it seems this limit is not APIC related since iirc 82489DX allows
to address 2^14 bits, x2APIC - more then 128 entities too. So I suspect
it somehow cpu bitmap related. Am I wrong (I didn't _check_ the code)?

		- Cyrill -