Messages in this thread | | | Date | Sat, 15 Nov 2003 19:36:52 00100 (CET) | From | "Job 317" <> | Subject | Re: 2.4.22 SMP kernel build for hyper threading P4 |
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On 15-Nov-2003 17:30:11 +0100, you wrote: > > I have a new P4 Hyperthreading PC that I have installed RedHat9 on. I am > > I presume you realize that anyone who understands HT has mostly scorn for it.
I had no idea but it is still a huge improvement over my HP 755MHz Celleron that I am replacing ;) Might I as why so and am I wasting my time when a non-SMP kernel builds and works just fine?
> > > api, etc.) but when I build my new 2.4.22 kernel with CONFIG_SMP=y set > > then reboot, I am seeing only one processor in /proc/cpuinfo. When I > > boot with my stock RH9 2.4.20-20.9smp kernel I see two virtual > > processors show up in /proc/cpuinfo. > > I'm guessing you don't have acpi enabled.
Hmm... Let's have a look. I started by loading the kernel-2.4.20-i686-smp.config file that came with the RH9 distro into xconfig. I just turned on ntfs and a couple of other things and saved. The comparision is strange. My new config file has:
# CONFIG_ACPI is not set
however the RH9 config file has:
# CONFIG_ACPI is not set # CONFIG_ACPI_DEBUG is not set # CONFIG_HOTPLUG_PCI_ACPI is not set # CONFIG_ACPI_HT_ONLY is not s CONFIG_ACPI_BUSMGR=m CONFIG_ACPI_SYS=m CONFIG_ACPI_CPU=m CONFIG_ACPI_BUTTON=m CONFIG_ACPI_AC=m CONFIG_ACPI_EC=m CONFIG_ACPI_CMBATT=m CONFIG_ACPI_THERMAL=m CONFIG_ACPI_RELAXED_AML=y
So should I have all this or no?
> > > I've even build a 2.4.22 kernel with the config-2.4.20-20.9smp > > configuration that came with RH9. > > RH doesn't ship kernel.org sources, of course. hence the -20.
Rgr. I got this.
> > > I build with the straightforward 'make dep clean bzImage modules > > modules_install' command. Is this correct? > > sure. obviously, you need to verify that you're booting the kernel > that you just made, etc.
It does boot and everything else "seems" fine. Just that I still only get one virtual CPU showing up in /proc/cpuinfo.
> > > Am I missing a step to build a smp kernel for hyper threading? > > HT is a non-feature; it requires nothing from the kernel. I'm > guessing your problem is bios or acpi. >
I still don't understand. So am I wasting my time with HT?
Thanks,
Job | |