Re: Lockdep warning with init_espfix_ap()

From: H. Peter Anvin
Date: Wed Oct 15 2014 - 12:05:44 EST


On 10/15/2014 09:03 AM, Prarit Bhargava wrote:
>>
>> It is kind of a messy situation, because this code needs to allocate
>> memory but is run before the secondary CPU is fully up. As such, it is
>> a false positive, at least in some ways.
>
> Interesting -- FWIW, I can reproduce this 100% of the time on _one_ system. It
> isn't a big deal and likely just worth noting at this point. I *always* see it
> when bringing up CPU 64 (of 128).
>

... because that is the first CPU which needs to allocate memory.

-hpa


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