Subject: Re: physically contiguous memory
To: Emmanuel Dreyfus <>
From: Jason R Thorpe <>
List: tech-kern
Date: 03/26/2001 13:23:18
On Mon, Mar 26, 2001 at 11:19:27PM +0200, Emmanuel Dreyfus wrote:

 > > Note that with bus_dmamem_alloc() you don't have to have the memory
 > > mapped in the kernel which saves you kernel page table descriptors.
 > So it could work by asking the kernel to leave untouched some part of
 > the memory? (it's the way it's done on Linux)
 > How do you tell the kernel to not use some part of the memory?

Uh, by allocating it.

        -- Jason R. Thorpe <>