Date: Tue, 14 Jun 2005 10:29:31 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd@akruijff.dds.nl>, "Stephen Montgomery-Smith" <stephen@math.missouri.edu> Cc: kama <kama@pvp.se>, freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: 5.4 not running HTT Message-ID: <005301c570c3$93fde1f0$b3db87d4@multiplay.co.uk> References: <20050610170707.T66195@ns1.as.pvp.se> <01fe01c56dd3$9fa11bf0$b3db87d4@multiplay.co.uk> <42A9F2DB.8050600@math.missouri.edu> <20050614000505.GD739@Alex.lan>
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[quote=FreeBSD-SA-05:09.htt.asc] NOTE: For users that are certain that their environment is not affected by this vulnerability, such as single-user systems, Hyper-Threading Technology may be re-enabled by setting the tunable "machdep.hyperthreading_allowed". [/quote] ----- Original Message ----- From: "Alex de Kruijff" <freebsd@akruijff.dds.nl> > On Fri, Jun 10, 2005 at 03:06:51PM -0500, Stephen Montgomery-Smith wrote: >> Steven Hartland wrote: >> >Have a read /usr/src/UPDATING it explains. >> > >> >> It should be in /usr/src/UPDATING, but I don't see it there myself. >> >> I got bitten by the same problem. The other guy who gave >> ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.asc >> provided the right answer, but it should be also mentioned in UPDATING. > > Now it is. But its a bit vage. (i.e. what is a knob) > 20050513: p1 FreeBSD-SA-05:09.htt > Add a knob for disabling/enabling HTT. Default off due to > information > disclosure on multi-user systems. > > I assume it can be turned on by > echo 'kern.sched.ipiwakeup.htt2=1' >> /etc/sysctl.conf > > -- > Alex > > ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137 or return the E.mail to postmaster@multiplay.co.uk.
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