Hello, So, Jens noticed that fio process exiting takes seconds when there are multiple aio contexts and the culprit seems to be the serial percpu_ref draining in exit_aio(). It's generally a bad idea to expose RCU latencies to userland because they add up really quickly and are unrelated to other performance parameters. Can you guys please at least update the code so that it waits for all percpu_refs to drain at the same time rather than one after another? That should resolve the worst part of the problem.
Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
