fsync(2) manual and hdd write caching

[Bruce Cran]

On Tue, 26 Oct 2010 21:36:18 +0000
Alexander Best <arundel at freebsd.org> wrote:

> since there's a thread on freebsd-questions@ concerning fsync(2) and
> the fact that hdd write caching can cause this syscall to basically
> be a no op, could somebody please copy the BUGS section from sync(2)
> to fsync(2)?

Shouldn't the BUGS section of sync(2) be removed?

"The sync() system call may return before the buffers are completely
     flushed."

But from
http://www.opengroup.org/onlinepubs/009695399/functions/sync.html : 

"The writing, although scheduled, is not necessarily complete upon
return from sync()."

That would suggest it's not actually a bug.

-- 
Bruce Cran