light weight write barriers

[Andi Kleen]

Richard Hipp writes:
>
> We would really, really love to have some kind of write-barrier that is
> lighter than fsync().  If there is some method other than fsync() for
> forcing a write-barrier on Linux that we don't know about, please enlighten
> us.

Could you list the requirements of such a light weight barrier?
i.e. what would it need to do minimally, what's different from
fsync/fdatasync ?

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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