Top only showing one active CPU on HTT system

Jonathan M. Slivko freebsd-lists at slivko.org
Tue May 24 10:14:38 PDT 2005


Where did you actually set that, in /etc/sysctl.conf?

Kirk Strauser wrote:
> On Tuesday 24 May 2005 10:59, Tim Kellers wrote:
> 
> 
>>The acpi_load="YES" in /boot/loader.conf might do the trick.
> 
> 
> Actually, it turns out that I have to set machdep.hyperthreading_allowed=1 
> for HTT to work now.
> 
> Speaking of which, is that tunable documented anywhere besides the HTT 
> security PR?  It's not in the 5.4-STABLE /usr/src/UPDATING or anyplace else 
> I've looked, so I was more than a bit surprised to find that such an 
> important default was changed without much notice.  I imagine a lot of 
> people read the PR much as I did: "blah, blah, theoretical, doesn't affect 
> me, next message"...

-- 
  Jonathan M. Slivko - jonathan at slivko.org
"Linux: The Choice for the GNU Generation"
          - http://www.linux.org/ -

Don't fear the penguin.
          .^.
          /V\
        /(   )\
         ^^-^^
   He's here to help.


More information about the freebsd-questions mailing list