On Fri, Apr 02 2021 at 15:49, paulmck wrote: > From: "Paul E. McKenney" <paul...@kernel.org> > > Although smp_call_function() has the advantage of simplicity, using > it to check for cross-CPU clock desynchronization means that any CPU > being slow reduces the sensitivity of the checking across all CPUs. > And it is not uncommon for smp_call_function() latencies to be in the > hundreds of microseconds. > > This commit therefore switches to smp_call_function_single(), so that > delays from a given CPU affect only those measurements involving that > particular CPU.
Is there any reason I'm missing why this is not done right in patch 3/5 which introduces this synchronization check? Thanks, tglx