* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > BTW. Do you have your test case at hand ? > > My test-case is a joke. It's explicitly *trying* to get as much > contention as possible on a dentry, by just starting up a lot of threads > that look up one single pathname (the same one for everybody). It > defaults to using /tmp for this, but you can specify the filename. Waiman's tests seemed to use sufficiently generic and varied workloads (AIM7) and they showed pretty nice unconditional improvements with his variant of this scheme, so I think testing with your simple testcase that intentionally magnifies the scalability issue is 100% legit and may in fact help tune the changes more accurately, because it has less inherent noise. And that was on a 80 core system. The speedup should be exponentially more dramatic on silly large systems. A nicely parallel VFS isn't a bad thing to have, especially on ridiculously loud hardware you want to run a continent away from you. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
