杨苏立 Yang Su Li, on 11/15/2012 11:14 AM wrote:
> 1. fsync actually does two things at the same time: ordering writes (in a
> barrier-like manner), and forcing cached writes to disk. This makes it very
> difficult to implement fsync efficiently.
Exactly!
> However, logically they are two distinctive functionalities
Exactly!
Those two points are exactly why concept of barriers must be forgotten for sake of
productivity and be replaced by a finer grained abstractions as well as why they
where removed from the Linux kernel
Vlad