Sure, but this is only important if you're working across kernels (or need correct persistence across a crash+reboot, which is "across kernels in time"). Withi

Sure, but this is only important if you're working across kernels (or need correct persistence across a crash+reboot, which is "across kernels in time"). Within a single kernel instance, two processes do not need to think about such synchronisation, or else just about all software written would be broken.