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Re:Linux's fsync() woes are getting some attention by mnarayan01 on Monday March 10, 2014 @06:58PM (#7376247)
Is that not the purpose of [aio_fsync](http://pubs.opengroup.org/onlinepubs/009696899/functions/aio...)?

Disclaimer: I've never used it, I just filed it in the back of my mind for if I wanted to do basically what you just described.

Re:Linux's fsync() woes are getting some attention by justincormack on Monday March 10, 2014 @07:32PM (#7376413)
Doesn't exist on Linux as a kernel interface, although the API is there; if it works it is either a thread doing fsync or its synchronous.