Date: Fri, 22 Jul 2005 11:15:50 -0700 From: Lei Sun <lei.sun@gmail.com> To: Andreas Rudisch <"cyb."@gmx.net> Cc: freebsd-questions@freebsd.org Subject: Re: only see cpu0 working after rebuilding kernel with SMP support Message-ID: <d396fddf05072211156e8bd7f3@mail.gmail.com> In-Reply-To: <d396fddf05072209474d9c7314@mail.gmail.com> References: <d396fddf05072200121b068cd9@mail.gmail.com> <1122023424.525.1.camel@p4-3200.local> <d396fddf05072209474d9c7314@mail.gmail.com>
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This thread helped http://archives.neohapsis.com/archives/freebsd/2005-05/0037.html On 7/22/05, Lei Sun <lei.sun@gmail.com> wrote: > Yes, I read that security advisory as well, and I see >=20 > ----------------------- > 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". > ----------------------- >=20 > so I "echo "machdep.hyperthreading_allowed" >> /boot/load.conf", then reb= oot. >=20 > But still only 1 CPU is running. >=20 > Thanks in advance :) >=20 > Lei >=20 > On 7/22/05, Andreas Rudisch <"cyb."@gmx.net> wrote: > > On Fri, 2005-07-22 at 00:12 -0700, Lei Sun wrote: > > > Hi, > > > I wanted to enable the second logical CPU on my P4 HT. and... > > > Something seems to be strange to me as: > > > > > > All of the processes are running with CPU0 and none is working with C= PU1 > > > > > Here is the steps and places I read and followed > > > > > > 1. I followed the custom kernel documents from > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfi= g-building.html > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfi= g-config.html > > > http://www.freebsddiary.org/smp.php > > > > > > and compiled the custom kernel > > > > > > and my kernel config: > > > ------------------------------------------------- > > > ... > > > options SMP > > > device apic # I/O APIC > > > ... > > > ------------------------------------------------- > > > > > > 2. Then I compiled the custom kernel, and installed it > > > > > > 3. I check the startup output, and found > > > SMP: AP CPU #1 Launched! > > > > > > So my question is, how come in top, only cpu0 is working, and no entr= y for cpu1? > > > > > > Thanks in advance:) > > > > > > Lei > > > > > > Take a look at this: > > > > ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.= asc > > > > Andreas. > > > > -- > > GnuPG key : 0xD25FCC81 | http://cyb.websimplex.de/pubkey.asc > > Fingerprint: D182 6F22 7EEC DD4C 0F6E 564C 691B 0372 D25F CC81 > > > > > > > > > > > > -----BEGIN PGP SIGNATURE----- > > Version: GnuPG v1.4.1 (FreeBSD) > > > > iD8DBQBC4LgAaRsDctJfzIERAtX8AJ9fJBbODWbOxymKEFeHNpULtUrecACfYsWG > > IcmXfXCmO9ZpgCxDOlOwQWc=3D > > =3Dzfk/ > > -----END PGP SIGNATURE----- > > > > > > >
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