Subject: Re: Questions about memory allocation for device drivers.
To: None <email@example.com>
From: Jason R Thorpe <firstname.lastname@example.org>
Date: 08/23/2001 09:59:26
On Thu, Aug 23, 2001 at 09:13:54AM -0700, Mark Milligan wrote:
> bus_dma functions ( ethernet etc.) to guarantee they have wired down memory.
> Is the softc driver memory wired down? or will it page? It seems to me it
> should be wired down and should not page. If they page should the autoconf
> routine force the memory to be wired down? This may improve the performance of
> device drivers.
> Also shouldnt the ISR routines be wired down so they do not page? My
> understanding is that kernel code can be paged in and out.
It is wired down, and the kernel text/data/bss is also wired down.
-- Jason R. Thorpe <email@example.com>