On Wed, Aug 21, 2024 at 02:18:44AM CEST, Greg Wooledge <g...@wooledge.org> said: > On Tue, Aug 20, 2024 at 20:04:11 -0400, Roberto C. Sánchez wrote: > > sync && sync && sync && swapoff > > > > I couldn't tell why I have sync 3 times, but I know that it's how I've > > called swapoff since as far back as I can remember. > > Cargo cult. It was never useful to the best of my knowledge.
Once upon a time, the sync command would return before the actual syscall where completed. Doing 3 times sync gave you a very high probability that the first one indeed completed all its writes. But it was already false in SunOS 4 (~1990) -- Erwan David
