[PATCH 1/9] x86/tsc: Provide tsc=unstable boot parameter

2017-04-21 Thread Peter Zijlstra
Since the clocksource watchdog will only detect broken TSC after the fact, all TSC based clocks will likely have observed non-continuous values before/when switching away from TSC. Therefore only thing to fully avoid random clock movement when your BIOS randomly mucks with TSC values from SMI

[PATCH 1/9] x86/tsc: Provide tsc=unstable boot parameter

2017-04-21 Thread Peter Zijlstra
Since the clocksource watchdog will only detect broken TSC after the fact, all TSC based clocks will likely have observed non-continuous values before/when switching away from TSC. Therefore only thing to fully avoid random clock movement when your BIOS randomly mucks with TSC values from SMI