[poll] hyperthreading_allowed, hlt_logical_cpus, mp_watchdog

[Patrick Lamaiziere]

Le Tue, 24 May 2011 16:21:08 +0300,
Andriy Gapon <avg at FreeBSD.org> a écrit :

Hello,
 
> I am planning on some changes in head and would like to see if people
> use the following features:
> - machdep.hyperthreading_allowed tunable and sysctl

If I remember well, these tunables were introduced because the
paper of Colin Percival about the HTT security flaw on intel
processors :
http://www.daemonology.net/hyperthreading-considered-harmful/

http://security.freebsd.org/advisories/FreeBSD-SA-05:09.htt.asc

I guess this is still a concern?.

Best regards.