[PATCH 9/9] sched/clock: Print a warning recommending tsc=unstable

2017-04-21 Thread Peter Zijlstra
With our switch to stable delayed until late_initcall(), the most likely cause of hitting mark_tsc_unstable() is the watchdog. The watchdog typically only triggers when creative BIOS'es fiddle with the TSC to hide SMI latency. Since the watchdog can only detect TSC fiddling after the fact all TSC

[PATCH 9/9] sched/clock: Print a warning recommending tsc=unstable

2017-04-21 Thread Peter Zijlstra
With our switch to stable delayed until late_initcall(), the most likely cause of hitting mark_tsc_unstable() is the watchdog. The watchdog typically only triggers when creative BIOS'es fiddle with the TSC to hide SMI latency. Since the watchdog can only detect TSC fiddling after the fact all TSC