On Mon, Dec 09, 2002 at 11:07:38PM +0100, Manuel Bouyer wrote:

 > I don't know for LFS, but if I remember properly, softdeps is doing its
 > own write barrier by waiting for some kind of I/O to complete before
 > starting new writes (basically it needs metadata I/O to be keept ordered
 > but data can be written in no specific order).

Right, by simply waiting (using biowait) or using a callback, there's no
explcitit "this is synchronous i/o" indication in the buffer, so you need
some sort of other indication.

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>