Re: initdb and fsync

I wrote:
> I'm picking up this patch now.  What I'm inclined to do about the -N
> business is to commit without that, so that we get a round of testing
> in the buildfarm and find out about any portability issues, but then
> change to use -N after a week or so.  I agree that in the long run
> we don't want regression tests to run with fsyncs by default.

Committed without the -N in pg_regress (for now).  I also stuck
sync_file_range into the backend's pg_flush_data --- it would be
interesting to hear measurements of whether that makes a noticeable
difference for CREATE DATABASE.
        regards, tom lane