On Mon, 29 Jan 2018 16:54:31 +0100 Peter Zijlstra <[email protected]> wrote:
> 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. Oh, OK. I thought we could find a way to avoid the timer in the kernel for certain CPUs like mine. Thanks for the explanation. > > Sadly MSR_IA32_TSC and MSR_IA32_TSC_ADJUST are writable registers and > BIOS monkeys occasionally write to them for 'raisins-of-insanity'. >
