linux-kernel - Re: dual Xeon hyperthread system only showing up as 2 cpus

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Message-ID: <46C48160.3070401@nortel.com>
Date:	Thu, 16 Aug 2007 10:54:56 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	linux-kernel@...r.kernel.org
Subject: Re: dual Xeon hyperthread system only showing up as 2 cpus

Robert Hancock wrote:

> You snipped the important part of the log. It's not using ACPI in 2.6.14 
> for some reason, which you need for HT to be detected. Either you didn't 
> configure it in or it's failed to enable somehow. Please post the entire 
> dmesg.

Wacky.  In 2.6.10 CONFIG_ACPI is disabled, but somehow it has 
CONFIG_ACPI_BOOT=y and CONFIG_ACPI_BLACKLIST_YEAR=0.

In 2.6.14, turning on CONFIG_ACPI allows it to detect 4 cpus.

Thanks for the help.

Chris
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