From: "Aaron Durbin" <adurbin@google.com>
To: "Yinghai Lu" <yhlu.kernel@gmail.com>
Cc: "Andi Kleen" <ak@suse.de>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
len.brown@intel.com, akpm@osdl.org
Subject: Re: [PATCH] ACPI: Add reboot mechanism
Date: Tue, 17 Jul 2007 08:08:19 -0700 [thread overview]
Message-ID: <8f95bb250707170808n19799ba5l3acd13e2ee7e0f08@mail.gmail.com> (raw)
In-Reply-To: <86802c440707170740i30ed2110l130dafbec8e4d4a5@mail.gmail.com>
On 7/17/07, Yinghai Lu <yhlu.kernel@gmail.com> wrote:
> On 7/17/07, Andi Kleen <ak@suse.de> wrote:
> > On Monday 16 July 2007 20:00:19 Aaron Durbin wrote:
> > >
> > > Add the ability to reset the machine using the RESET_REG in ACPI's FADT table.
> >
> > Why? I had such a patch at some point as experiment, but it never
> > helped actually fix a box.
> >
> system without superio, should still have SMI to simulate one keyboard
> controller. So the key board reset still works.
This is true if SMIs are still flowing, and the SMI handler correctly handles
the reset properly. I have seen cases where the SMI handler is broken which
causes the system to perpetually hang. Utilizing the exposed reset mechanism
in ACPI should reset the system every time. However, if the reset fails it
will fall back to the keyboard controller.
-Aaron
next prev parent reply other threads:[~2007-07-17 15:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 18:00 Aaron Durbin
2007-07-16 18:17 ` Arjan van de Ven
2007-07-16 18:22 ` Aaron Durbin
2007-07-17 1:46 ` Shaohua Li
2007-07-17 2:10 ` Aaron Durbin
2007-07-17 11:31 ` Andi Kleen
2007-07-17 14:40 ` Yinghai Lu
2007-07-17 15:08 ` Aaron Durbin [this message]
2007-07-17 15:42 ` Andi Kleen
2007-07-17 15:47 ` Aaron Durbin
2007-07-17 15:08 ` Aaron Durbin
2007-07-27 6:17 ` Pavel Machek
[not found] <fa.IMXKKgfBkv/U+MG0xx5sLkpV2Ws@ifi.uio.no>
[not found] ` <fa.+iOE+OqrQUbecN788fV4aEhLLtg@ifi.uio.no>
2007-07-17 14:39 ` Robert Hancock
2007-07-17 15:41 ` Andi Kleen
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