On Wed, May 20, 2009 at 10:28:14AM +0800, yanh wrote: > I have test this patch just now. It works well on yeeloong. Thanks for testing. > I have one question what's the difference between the two patch? Uncached writes can't be re-ordered. By adding a read after the last write my patch forces not only completion of the preceding write but due to this ordering constraint also completion of all preceding writes is enforced. I/O space writes are slow. I mean slower than slugs in space. So my patch is an optimization but that was not the point; I really only meant to verify that we understood what's going on and we seem to. Now let's fix the real issue and make outX() non-posted. Ralf
