> The problem is: if a user cares about that performance difference, he probably knows how to use tmpfs himself.
Are you serious? The only people who care about performance are people who dig into the arcane configuration details of OSes ?? I don't think so.
Wasn't there a recent quote of the week along the lines of "We should make things simple and safe so that people don't *need* to carefully form good habits."?? I think that applies here to, only is so that people don't *need" to dig into arcane details.
I agree that we shouldn't make /tmp == tmpfs the default while it causes problems. But I do think that we should work to fix the problems so that we can do it safely.