Messages in this thread | | | Date | Sun, 10 Aug 2003 07:00:32 -0500 | From | Greg Norris <> | Subject | Re: [2.6.0-test3] Hyperthreading gone |
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On Sun, Aug 10, 2003 at 09:03:42AM +0200, Florian Weimer wrote: > I didn't. Previous experience (with some 2.5.x versions) indicates > that Linux does not support full ACPI on this machine. The > documentation suggests that the command line option enables full ACPI, > so I hesitate to do this.
According to the 2.6.0-test3 menuconfig help text, the parameter is required when CPU Enumeration Only is selected, and enables only limited ACPI support. For whatever it's worth, that matches my experience.
CONFIG_ACPI_HT_ONLY:
This option enables limited ACPI support -- just enough to enumerate processors from the ACPI Multiple APIC Description Table (MADT). Note that ACPI supports both logical (e.g. Hyper- Threading) and physical processors, where the MultiProcessor Specification (MPS) table only supports physical processors.
Full ACPI support (CONFIG_ACPI) is preferred. Use this option only if you wish to limit ACPI's role to processor enumeration.
In this configuration, ACPI defaults to off. It must be enabled on the command-line with the "acpismp=force" option.
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