Le Mon, May 20, 2024 at 04:25:33PM -0700, Paul E. McKenney a écrit : > Good points! How about the following? > > // Note that cpu_curr_snapshot() picks up the target > // CPU's current task while its runqueue is locked with > // an smp_mb__after_spinlock(). This ensures that either > // the grace-period kthread will see that task's read-side > // critical section or the task will see the updater's pre-GP > // accesses. The trailng smp_mb() in cpu_curr_snapshot()
*trailing > // does not currently play a role other than simplify > // that function's ordering semantics. If these simplified > // ordering semantics continue to be redundant, that smp_mb() > // might be removed. > > Keeping in mind that the commit's log fully lays out the troublesome > scenario. Yep, looks very good! Thanks! > > Thanx, Paul >
