New USB stack and Zero copy.

[John Baldwin]

On Saturday 07 July 2007 12:14:24 pm Hans Petter Selasky wrote:
> On Friday 06 July 2007 22:41, John Baldwin wrote:
> > On Friday 06 July 2007 02:59:39 am Hans Petter Selasky wrote:
> > > On Friday 06 July 2007 01:35, John Baldwin wrote:
> > > > On Thursday 05 July 2007 04:25:17 pm John Baldwin wrote:
> > > > > On Thursday 05 July 2007 03:31:59 am Hans Petter Selasky wrote:
> > > > > > On Wednesday 04 July 2007 19:35, John-Mark Gurney wrote:
> > > > > > > Hans Petter Selasky wrote this message on Wed, Jul 04, 2007 at
> 
> >
> > Huh?  The bounce pages are preallocated, so bus_dmamap_load() isn't going
> > to be allocating things.
> 
> When are they allocated ?

UTSL.  bus_dma_tag_create() (if you pass BUS_DMA_ALLOCNOW) or 
bus_dmamap_create() for the first map belonging to a tag.

-- 
John Baldwin