From: Jeff Garzik <jgarzik@pobox.com>
To: "Brown, Len" <len.brown@intel.com>, Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Hyper-threaded pickle
Date: Thu, 04 Mar 2004 23:52:37 -0500 [thread overview]
Message-ID: <40480795.5000402@pobox.com> (raw)
So,
Just now getting my dual athlon going under 2.6.x. It _really_ doesn't
like ACPI.
ACPI specifications dictate some hardware characteristics, as well as
specifying table structures and such. One of those characteristics is
the 4-second poweroff: if you hold down the power button for 4-5
seconds, your motherboard is required to poweroff the machine. This is
supposed to be a hard poweroff, and on most machines this works even
when various pieces of hardware are frozen/locked-up.
Turning on ACPI kills my 4-second poweroff, which is pretty darn
impressive. So I proceed to disable ACPI... but CONFIG_ACPI_BOOT
doesn't want to disable. I am trying to restore my working, non-ACPI
configuration under 2.6, but this seems to be preventing me from doing so:
drivers/acpi/Kconfig:
config ACPI_BOOT
bool
depends on ACPI || X86_HT
default y
arch/i386/Kconfig:
config X86_HT
bool
depends on SMP && !(X86_VISWS || X86_VOYAGER)
default y
My dual athlon _definitely_ doesn't have hyperthreading, and I am
willing to bet that force-enabling the ACPI boot and HT code for all SMP
machines breaks other older-SMP boxes as well.
Jeff
next reply other threads:[~2004-03-05 4:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-05 4:52 Jeff Garzik [this message]
2004-03-05 6:44 ` Hyper-threaded pickle Len Brown
2004-03-06 15:40 ` Jeff Garzik
2004-03-08 5:02 ` Len Brown
[not found] <1wfBD-6GI-9@gated-at.bofh.it>
[not found] ` <1whjQ-8sH-25@gated-at.bofh.it>
[not found] ` <1wMeo-Sr-3@gated-at.bofh.it>
[not found] ` <1xlbI-6Rl-5@gated-at.bofh.it>
2004-03-09 20:14 ` Bill Davidsen
2004-03-14 3:35 ` Andi Kleen
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