Re: HT apparently not detected properly on 2.4.23
From: Mike Fedyk
Date: Wed Dec 03 2003 - 14:58:39 EST
On Wed, Dec 03, 2003 at 08:40:51PM +0100, Andre Tomt wrote:
> On Wed, 2003-12-03 at 19:46, Ethan Weinstein wrote:
> > Hi,
> > With 2.4.22, my Supermicro X5DPL-iGM-O (E7501 chipset) with 2
> > xeons@xxxxxx 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
> This may be the known problem about CONFIG_NR_CPU's not working properly
> in all cases. Try up'ing it to 32.
Depending on the logical addressing of your processors, CONFIG_NR_CPUS=8 may
work in this case too.
Some processors/motherboards logically address the CPUs other that 0-3 if
there are 4 processors.
Currently CONFIG_NR_CPUS needs to be big enough to hold the largest logical
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