linux-kernel - Re: v3.9 - CPU hotplug and microcode earlier loading hits a mutex deadlock (x86_cpu_hotplug_driver

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Message-ID: <518A6D3F.4040405@zytor.com>
Date:	Wed, 08 May 2013 08:20:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
	x86@...nel.org, fenghua.yu@...el.com, xen-devel@...ts.xensource.com
Subject: Re: v3.9 - CPU hotplug and microcode earlier loading hits a mutex
 deadlock (x86_cpu_hotplug_driver_mutex)

On 05/08/2013 07:29 AM, Borislav Petkov wrote:
> On Wed, May 08, 2013 at 10:03:42AM -0400, Konrad Rzeszutek Wilk wrote:
> 
> [ … snip some funky BIOS code ]
> 
>> [here it shifts and continues on testing each CPU bit]
>>
>>> Questions over questions...?
>>
>> I probably went overboard with my answers :-)
> 
> Konrad, you're killing me! :-) You actually went and looked at the
> BIOS disassembly voluntarily. You must be insane, I think you should
> immediately go to the doctor now for a thorough checkup. :-)
> 
> I think I know who I can sling BIOS issues now to.
> 

Nah, that was just the ACPI AML.  Real BIOS code is much scarier.

	-hpa

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