Re: Unifying /dev/{mem,kmem,zero,null} implementations

[Andrew Doran <ad%netbsd.org@localhost>]

On Sun, Feb 24, 2008 at 12:40:51AM +0000, Chris Gilbert wrote:

> In theory pmap_kremove could be optimised to not change anything in 
> hardware, and defer the work to be done till the pmap_update, while I 
> don't believe any platform has gone to that level yet, we shouldn't 
> exclude the possibility by not following the documented API.

FWIW, the x86 pmap uses pmap_update() to defer waiting for completion of
TLB shootdown interrupts.

Andrew