On Tue, Jun 19, 2018 at 07:32:49PM +0200, Thomas Gleixner wrote: > On Fri, 15 Jun 2018, Pavel Tatashin wrote: > > > tsc_disabled is set when notsc is passed as kernel parameter. The reason we > > have notsc is to avoid timing problems on multi-socket systems. We already > > have a mechanism, however, to detect and resolve these issues by invoking > > tsc unstable path. Thus, make notsc to behave the same as tsc=unstable. > > notsc also excludes TSC from being used at all
It does not; there is TSC usage even if you boot with notsc on. See how it does not clear X86_FEATURE_TSC for instance.
