Date: Fri, 22 Jul 2005 09:47:47 -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: <d396fddf05072209474d9c7314@mail.gmail.com> In-Reply-To: <1122023424.525.1.camel@p4-3200.local> References: <d396fddf05072200121b068cd9@mail.gmail.com> <1122023424.525.1.camel@p4-3200.local>
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Yes, I read that security advisory as well, and I see ----------------------- 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". ----------------------- so I "echo "machdep.hyperthreading_allowed" >> /boot/load.conf", then reboo= t. But still only 1 CPU is running. Thanks in advance :) Lei 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 CPU= 1 >=20 > > 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/kernelconfig-= building.html > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-= 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 entry = for cpu1? > > > > Thanks in advance:) > > > > Lei >=20 >=20 > Take a look at this: >=20 > ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.as= c >=20 > Andreas. >=20 > -- > GnuPG key : 0xD25FCC81 | http://cyb.websimplex.de/pubkey.asc > Fingerprint: D182 6F22 7EEC DD4C 0F6E 564C 691B 0372 D25F CC81 >=20 >=20 >=20 >=20 >=20 > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (FreeBSD) >=20 > iD8DBQBC4LgAaRsDctJfzIERAtX8AJ9fJBbODWbOxymKEFeHNpULtUrecACfYsWG > IcmXfXCmO9ZpgCxDOlOwQWc=3D > =3Dzfk/ > -----END PGP SIGNATURE----- >=20 >=20 >
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