cvs commit: www/en/releases/6.1R todo.sgml

[Alexander Leidinger]

On Sat, 28 Jan 2006 14:54:57 +0000
Xin LI <delphij at FreeBSD.ORG> wrote:

> On Sat, Jan 28, 2006 at 01:05:06PM +0100, Alexander Leidinger wrote:
> > 
> > Since we don't enable the use of HT per default for security reasons
> > (or did this change without me noticing this?), we don't need to detect
> > HT in this case.
> 
> Because that the disable is implemented in a way that run idle cycle
> on the logical CPU I think we do need to detect it...

Replace "second" in the following with an appropriate number...

Not in this case, I think. If we have a UP kernel, the second hardware
tread isn't used. And if there's no second CPU core, there's no need to
use a SMP kernel at all. Since the loader only has to load the SMP
kernel when there's a second core, but not if there's a second hardware
thread, we just need those bits in the loader which detect the second
core (mptable) and not the HT detection bits.

Detecting and disabling HT when booting a SMP kernel can then happen as
usual.

Bye,
Alexander.

-- 
                      Loose bits sink chips.
http://www.Leidinger.net                       Alexander @ Leidinger.net
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