Re: CVS: cvs.openbsd.org: src

[Artur Grabowski]

This was ok oga@, beck@ and thib@

On Thu, Jul 1, 2010 at 11:27 PM, Artur Grabowski <a...@cvs.openbsd.org> wrote:
> CVSROOT:        /cvs
> Module name:    src
> Changes by:     a...@cvs.openbsd.org     2010/07/01 15:27:39
>
> Modified files:
>        sys/kern       : kern_physio.c
>        sys/uvm        : uvm_extern.h uvm_glue.c
>
> Log message:
> Implement vs{,un}lock_device and use it for physio.
>
> Just like normal vs{,un}lock, but in case the pages we get are not dma
> accessible, we bounce them, if they are dma acessible, the functions behave
> exactly like normal vslock. The plan for the future is to have fault_wire
> allocate dma acessible pages so that we don't need to bounce (especially
> in cases where the same buffer is reused for physio over and over again),
> but for now, keep it as simple as possible.