On Mon, Jan 29, 2018 at 10:33:16AM -0500, Luiz Capitulino wrote: > Cool, passing tsc=reliable worked for me. I finally got to the tick to > go completely away. While I agree that fixing that is beyond the scope > of this series, I think we should improve it anyway since it will probably > come up for people trying the new nohz_full=.
The only way to fix that is to audit all BIOS code :/ Short of that, we need to periodically test the TSC on each CPU/SOCKET to verify its still in step with expectation. Sadly MSR_IA32_TSC and MSR_IA32_TSC_ADJUST are writable registers and BIOS monkeys occasionally write to them for 'raisins-of-insanity'.
