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
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