Hi,As of commit 12d4536f7d911b6d87a766ad7300482ea663cea2, the I/O thread is now enabled by default.
I think we've done about as much testing and preparation as we can. If you run into any odd regressions, you should be able to easily revert this commit still. We can hold off making significant further changes that would make reverting hard for a week or two.
Please send a note to the list if you think something is broken as a result of this change.
Regards, Anthony Liguori
