On Sun, Oct 19, 2008 at 05:07:02AM -0400, Christoph Hellwig wrote: > > This is probably the vmap cache aliasing problem that we paid a bit of > > attention to a few months ago, no? > > Shouldn't the cachepolicy switch take care of that? Setting cachepolicy=uncached should make aliasing issues disappear. If you're still seeing issues with cachepolicy=uncached, it's likely some other issue.