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SubjectHT apparently not detected properly on 2.4.23

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:
The same config with 2.4.23 only shows 2 cpus, even with:

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
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


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