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SubjectRe: HT apparently not detected properly on 2.4.23
On Wed, Dec 03, 2003 at 01:46:38PM -0500, Ethan Weinstein wrote:
> With 2.4.22, my Supermicro X5DPL-iGM-O (E7501 chipset) with 2
> xeons@2.4ghz and hypertherading enabled shows 4 cpu's in
> /proc/cpuinfo|proc/interrupts, with:
> CONFIG_ACPI=y
> CONFIG_ACPI_HT_ONLY=y
> The same config with 2.4.23 only shows 2 cpus, even with:
> CONFIG_NR_CPUS=4
> Also, I believe this has been reported before, but the system only seems
> to interrupt on CPU0 with either kernel, unless I apply a patch I found
> here:
> http://www.hardrock.org/kernel/2.4.22/irqbalance-2.4.22-MRC.patch
> or run the `irqbalance' program.. which I don't care to do. This
> problem _seems_ to be isolated to the Supermicro, as HT does seem
> properly detected on several other SMP systems I have at work (compaq
> ML370/ML380) with 2.4.23

You probably have sparse physical APIC ID's.


-- wli
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