Re: [BUG] x86: reboot doesn't reboot

[H. Peter Anvin]

Keep in mind we already tried CF9 in the default flow and it broke things.  I'm willing to wait for reports about production machines, though, but I fully expect them.

On April 3, 2014 6:27:48 PM PDT, "Li, Aubrey" <aubrey.li@xxxxxxxxxxxxxxx> wrote:
>On 2014/4/4 8:12, H. Peter Anvin wrote:
>> On 04/03/2014 04:52 PM, Li, Aubrey wrote:
>>> On 2014/4/4 7:40, Steven Rostedt wrote:
>>>> On Fri, 04 Apr 2014 07:23:32 +0800
>>>> "Li, Aubrey" <aubrey.li@xxxxxxxxxxxxxxx> 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.
>>>
>> 
>> Given that this machine doesn't have EFI, it seems kind of obvious,
>no?
>> 
>> 	-hpa
>
>Yes. it should be but I want to confirm.
>
>The current situation is,
>- we have one(do we know more?) preproduction machine hangs by CF9.
>- We have more than one(could be thousand known) production machine
>works by CF9.
>
>So, if I understand correctly(please correct me if I was wrong), I
>don't
>think the justification is enough to revert the patch. The patch
>includes EFI, CF9 and BIOS.
>
>I'm open to make Steven's machine work:
>(1) remove CF9
>(2) add DMI table
>(3) any other idea without a regression.
>
>I prefer (2) or (3) if better because if we do (1) we will probably
>receive some other regression reports.
>
>Thanks,
>-Aubrey

-- 
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