On Wed, 27 Jul 2005, Jason Thorpe wrote:

> > SGMAP_DEBUG.  What appears to be happening is that a spill page is
> > loaded in the sgmap_load routine, but the sgmap_unload routine doesn't
> > account for the spill page.  Now to try to figure out why.
>
> Lemme take a look at the code and see if I can see anything.  It'll
> be a good diversion while I burn CDs for a drive down to LA I have to
> do after work tomorrow.

  Aha - I see what happened, but not why yet.  The sgmap_load checks the
flags passed as an argument for BUS_DMA_READ being zero, an the
sgmap_unload checks the flags in map->_dm_flags.  The problem occurs when
BUS_DMA_READ is cleared in the passed argument, but is set in
map->_dm_flags.  I don't know why that is yet.

--
Michael L. Hitch			mhitch@montana.edu
Computer Consultant
Information Technology Center
Montana State University	Bozeman, MT	USA