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From: "H. Peter Anvin" <hpa@zytor.com>
To: "Li, Aubrey" <aubrey.li@linux.intel.com>,
	Matthew Garrett <mjg59@srcf.ucam.org>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>,
	"alan@linux.intel.com" <alan@linux.intel.com>,
	linux-kernel@vger.kernel.org, Len.Brown@intel.com,
	Adam Williamson <awilliam@redhat.com>
Subject: Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop
Date: Sat, 01 Mar 2014 16:33:15 -0800	[thread overview]
Message-ID: <53127C4B.1060505@zytor.com> (raw)
In-Reply-To: <53127AA7.8040700@linux.intel.com>

On 03/01/2014 04:26 PM, Li, Aubrey wrote:
>>
>> On March 1, 2014 12:21:39 PM PST, Matthew Garrett <mjg59@srcf.ucam.org> wrote:
>>> if we've hit the keyboard controller and ACPI twice, and the system is still alive, and 
>>> if we have standard PCI ports, 
> 
>>> it doesn't seem like poking them is likely to make anything actively
> worse.
>>
> This is exactly what I'm trying to express. thanks Matt. It doesn't make
> anything worse, it makes reboot working on some systems.
> 
> On 2014/3/2 4:26, H. Peter Anvin wrote:
>> True... trying cf9_cond with low priority probably makes sense.
> 
> I'm not asking CF9 only, I'm asking all of the known method in reboot.c.
> So, BIOS is appliable as well with the same logic and with low priority,
> isn't it?
> 

The problem comes in when a method doesn't just not work, but hangs the
machine.  BIOS *WILL* hang the machine if it doesn't work.  CF9 has been
known to hang the machine.

	-hpa



  reply	other threads:[~2014-03-02  0:33 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-28  4:11 [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop Li, Aubrey
2014-02-28  4:56 ` Matthew Garrett
2014-02-28  5:22   ` Li, Aubrey
2014-02-28  5:56     ` Matthew Garrett
2014-02-28  6:07       ` Li, Aubrey
2014-02-28  6:12         ` Matthew Garrett
2014-02-28  6:20           ` Li, Aubrey
2014-02-28  6:23             ` Matthew Garrett
2014-02-28  6:39               ` Li, Aubrey
2014-02-28  6:44                 ` Matthew Garrett
2014-02-28  6:54                   ` Li, Aubrey
2014-02-28 17:47                     ` H. Peter Anvin
2014-02-28 22:11                       ` Li, Aubrey
2014-02-28 22:16                         ` Adam Williamson
2014-03-01 17:10                         ` Li, Aubrey
2014-03-01 17:22                           ` Matthew Garrett
2014-03-01 17:31                             ` Li, Aubrey
2014-03-01 18:19                               ` Matthew Garrett
2014-03-01 19:01                                 ` Matthew Garrett
2014-03-02  0:15                                   ` Li, Aubrey
2014-03-01 20:06                             ` H. Peter Anvin
2014-03-01 20:21                               ` Matthew Garrett
2014-03-01 20:26                                 ` H. Peter Anvin
2014-03-02  0:26                                   ` Li, Aubrey
2014-03-02  0:33                                     ` H. Peter Anvin [this message]
2014-03-02  1:47                                       ` Li, Aubrey
2014-03-02  2:07                                         ` H. Peter Anvin
2014-03-02  2:20                                           ` Li, Aubrey
2014-03-02  2:23                                           ` Matthew Garrett
2014-03-02  2:35                                             ` H. Peter Anvin
2014-03-02 10:39                                               ` Li, Aubrey
2014-03-02 16:52                                                 ` H. Peter Anvin
2014-03-02 22:13                                                   ` Li, Aubrey
2014-03-02 22:26                                                     ` Matthew Garrett
2014-03-02 22:45                                                       ` Li, Aubrey
2014-03-02 23:11                                                         ` Matthew Garrett
2014-03-02 23:23                                                           ` Li, Aubrey
2014-03-03  0:07                                                             ` Matthew Garrett
2014-03-03  0:18                                                               ` H. Peter Anvin
2014-03-03  1:36                                                                 ` Li, Aubrey
2014-03-03  1:47                                                                   ` H. Peter Anvin
2014-03-03  1:49                                                                     ` Li, Aubrey
2014-03-03 22:11                                                                       ` Li, Aubrey
2014-03-02 23:57                                                     ` H. Peter Anvin
2014-03-05 23:39                                                 ` [tip:x86/reboot] x86, reboot: Add EFI and CF9 reboot methods into the default list tip-bot for Li, Aubrey
2014-03-05 23:45                                                 ` [tip:x86/reboot] x86, reboot: Only use CF9_COND automatically, not CF9 tip-bot for H. Peter Anvin

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