Re: [X86 ACPI SMP] system slow after cold start if processor moduleloaded

From: Andrew Morton
Date: Tue Feb 05 2008 - 18:15:33 EST


On Sat, 2 Feb 2008 16:05:41 +0100 (CET)
Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote:

> Hi
>
> Don't know if this should be considered a bug-report, or just another ACPI
> bug on my system. In any case, if the CONFIG_ACPI_PROCESSOR is enabled, on
> first boot after a power off the system is slow. Not like if only 1 of 2
> CPUs actually was running, much slower yet. Respectively, if the module is
> built into the kernel, it is slow more or less from the beginning - I
> guess, from the moment, when the module is initialized, if built as a
> module, it is slow after the module gets loaded. Also funny, it is only
> slow on the first boot, after a reboot into the same kernel it runs
> normally. The system is a dual P-II@400MHz, Compaq AP400. It is known to
> have various ACPI bugs, so, this is just another one of them. No idea
> whether or not this shall and can be fixed. At least wanted to document it
> in case someone has a similar problem.
>

(added linux-acpi)

If nothing happens with this (likely) then please raise a report against
acpi at bugzilla.kernel.org, thanks.

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