Re: [PATCH v2] arch/x86: Fix boot_cpu_data.microcode version output

[Oleksandr Natalenko]

Hi.

On 01.08.2018 17:59, Luck, Tony wrote:
> > There's no reliable way to get the old microcode revision which was
> > overwritten during the upgrade. If dmesg gets overwritten you lose, 
> > like
> > in all the other gazillion cases where you lose information due to 
> > that.
>
> The primary requirement here is that we report the version of the 
> microcode
> in use at the time of a crash. Keeping history of all updates seems to 
> me to
> beyond the scope of the kernel's responsibilities.
>
> It's not like these updates appear out of the ether. You have to go out 
> and
> grab a new package and install it.  User land can keep track of this 
> much
> more easily than the kernel.

I don't mind doing the right thing at all. It is just to inform you that 
it was found to be useful.

Also, [1].

Thanks â.

[1] https://xkcd.com/1172/

--
  Oleksandr Natalenko (post-factum)