Hi.
On 01.08.2018 13:38, Prarit Bhargava wrote:
After this patch, do we preserve an original microcode version
somewhere? If no,
why? Sometimes it is useful while debugging another crash because of
faulty
microcode.
Interesting, and thanks for bringing this up. Oleksandr, under what
circumstances would you want to know what the old version was. AFAICS
it is no
longer running and should not have an impact on the system?
Once the kernel log does not contain a printout regarding updated
microcode anymore (because the log buffer is limited in size and can be
overwritten) and once you have a vmcore, it is handy to use
boot_cpu_data to compare the microcode version with the per-CPU value to
find out that is was updated at all. Or, maybe, that can be inspected in
another way now?
--
Oleksandr Natalenko (post-factum)
