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 18:07:18 -0800 [thread overview]
Message-ID: <53129256.6060704@zytor.com> (raw)
In-Reply-To: <53128DA0.9060105@linux.intel.com>
On 03/01/2014 05:47 PM, Li, Aubrey wrote:
>
> Since we are not able to make things worse, let's make it better. So
> Let's dig into this. For the machine hangs by CF9, it's known to work by
> KBD, right? For the machine hangs by BIOS, do you know which method will
> make reboot work?
>
No.
> The answer will determine the sequence of the list. If BIOS hangs but
> either of ACPI/KBD/EFI/CF9 works, BIOS is behind of those ways. If BIOS
> hangs, no any other way can make it work. BIOS is still the last way.
>
> If CF9 hangs while ACPI/KBD hangs as well, and BIOS happened to work(do
> we really have one?), the above list still doesn't make things worse,
> reboot=b and dmidecode table still work.
We obviously have been over this a number of times, and the sad thing is
that we have very limited information. It is more complex than that,
even... I believe in some cases KBD works but it is slow, and so takes a
while.
-hpa
next prev parent reply other threads:[~2014-03-02 2:07 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
2014-03-02 1:47 ` Li, Aubrey
2014-03-02 2:07 ` H. Peter Anvin [this message]
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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