Persuasively argued. You appear to have your wish, as this
patch was merged in -pre5.
A `dirsync' option does make sense though, for the reasons which
Stephen outlined.
The whole handling of synchronous operations needs a rip-up-and-rewrite
anyway. We're currently holding onto a stack of locks while waiting
for the disk to spin round and round. It's a great scalability bottleneck
for multiple threads doing things in the same directory. This is
something I shall look at when the kernel versions turn odd.
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