Date: Thu, 3 Apr 2014 22:16:07 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: "Li, Aubrey" <aubrey.li@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Matthew Garrett <mjg59@srcf.ucam.org>
Subject: Re: [BUG] x86: reboot doesn't reboot
Message-ID: <20140403221607.7a1b5952@gandalf.local.home>
In-Reply-To: <533DF455.4040908@linux.intel.com>
References: <20140403021411.6236996f@gandalf.local.home>
	<070BEF4AC20468458C22969097656CD91163106C@shsmsx102.ccr.corp.intel.com>
	<533D001A.5030802@linux.intel.com>
	<20140403094155.04cc00bc@gandalf.local.home>
	<533D6BE7.3020608@zytor.com>
	<20140403104721.5f6c32b6@gandalf.local.home>
	<20140403111711.5bed4ff7@gandalf.local.home>
	<533D7C4F.4010504@zytor.com>
	<533D7C93.7080105@zytor.com>
	<20140403113921.23dceb75@gandalf.local.home>
	<533D8516.1040803@zytor.com>
	<20140403121314.246b03a7@gandalf.local.home>
	<533DED74.6050202@linux.intel.com>
	<20140403194018.7c67aec7@gandalf.local.home>
	<533DF455.4040908@linux.intel.com>
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Sender: linux-kernel-owner@vger.kernel.org

On Fri, 04 Apr 2014 07:52:53 +0800
"Li, Aubrey" <aubrey.li@linux.intel.com> wrote:

> On 2014/4/4 7:40, Steven Rostedt wrote:
> > On Fri, 04 Apr 2014 07:23:32 +0800
> > "Li, Aubrey" <aubrey.li@linux.intel.com> wrote:
> > 
> >> Can you please send the dmi table out?
> > 
> > I already did as a gz attachment to H. Peter. You were on the Cc, did
> > you not receive it?
> > 
> Oh, I got it. This is a Preproduction machine.
> When reboot failed via a method (=e or =p), there are two case.
> 
> Case 1: this method do nothing, pass the attempt chance to the next method
> Case 2: this method hangs the system
> 
> I want to know if CF9 is case 1 or case 2. Could you please try the following
> patch *without* any reboot parameters?
> 
> (1) If we didn't see any string, then EFI hangs your box.
> (2) if we see the first string but not the second one, CF9 hangs your box
> (3) if we see both, couldn't be, because BIOS works on your box.

Here's the output:

[  114.445327] reboot: Restarting system
[  114.449002] reboot: machine restart
[  114.453495] reboot: reboot via CF9...

-- Steve
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