On Mon, Aug 09, 2010 at 05:19:22PM -0400, Andreas Dilger wrote:
2000 fsyncs per second, anyway. I wasn't explicitly trying to limit any other
types of IO.
I actually picked 500us arbitrarily because it seemed to work, even for SSDs.
It was a convenient test vehicle, and not much more. That said, I like your
recommendation much better. I'll look into that.
I wondered if this would have been better off in the block layer than ext4?
Though I suppose that could imply two kinds of flush: flush-immediately, and
flush-shortly. I intend to try those flush drain elimination patches before I
think about this much more.