Quote of the week

[Posted September 23, 2020 by corbet]

/*
 * The worst case is that all tasks preempt one another in a migrate_disable()
 * region and stack on a single CPU. This then reduces the available bandwidth
 * to a single CPU. And since Real-Time schedulability theory considers the
 * Worst-Case only, all Real-Time analysis shall revert to single-CPU
 * (instantly solving the SMP analysis problem).
 */

— Peter Zijlstra