Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752009AbWHNLqQ (ORCPT ); Mon, 14 Aug 2006 07:46:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752011AbWHNLqQ (ORCPT ); Mon, 14 Aug 2006 07:46:16 -0400 Received: from py-out-1112.google.com ([64.233.166.180]:54413 "EHLO py-out-1112.google.com") by vger.kernel.org with ESMTP id S1752009AbWHNLqP (ORCPT ); Mon, 14 Aug 2006 07:46:15 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=MGHKzS4TdI7ejDLJHRYYCeXxvj7aB2H/KVgi5tT3hxS0H/FP3h7ZkkT4oVj+RwzsQxuUeXbBskTjbOxTNt4F2T3VrfipBkybaWOmjxLOVCqNl1aRsX+Ed3CON2Us8h0ZA88Q8k0NL/oNdmRPgROmCq93VwClCvz/ZuOt2N6pvEE= Message-ID: <6bffcb0e0608140446i9508a27y75c234721e3e70d0@mail.gmail.com> Date: Mon, 14 Aug 2006 13:46:14 +0200 From: "Michal Piotrowski" To: "Jan Engelhardt" Subject: Re: HT not active Cc: "Linux Kernel Mailing List" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1619 Lines: 65 Hi Jan, On 14/08/06, Jan Engelhardt wrote: > Hello list, > > > > I cannot get HT to be used on some machine: > > w04a# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 0 > model name : Intel(R) Pentium(R) 4 CPU 1700MHz > stepping : 10 > cpu MHz : 1694.890 > cache size : 256 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm up > bogomips : 3393.46 > > 'ht' indicates: > #define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */ > > so I installed an SMP kernel, which has > CONFIG_SMP=y > CONFIG_SUSPEND_SMP=y > CONFIG_X86_FIND_SMP_CONFIG=y > CONFIG_SCHED_SMT=y > CONFIG_X86_HT=y > > yet it shows the 'up' flag in cpuinfo > #define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */ > > What could be missing? Some BIOS option perhaps? > Thanks for any hints. Do you have CONFIG_NR_CPUS=2 in kernel config? > > > Jan Engelhardt > -- Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (http://www.stardust.webpages.pl/ltg/wiki/) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/