Re: [patch 7/8] Add a bootparameter to reserve high linear address space.

Rusty Russell
2006-08-05T23:17:33Z

On Sat, 2006-08-05 at 14:58 -0700, Andrew Morton wrote:
> On Thu, 03 Aug 2006 01:58:32 -0700
> Zachary Amsden <zach@vmware.com> wrote:
>
> > Add a bootparameter to reserve high linear address space for hypervisors.
> > This is necessary to allow dynamically loaded hypervisor modules, which
> > might not happen until userspace is already running, and also provides a
> > useful tool to benchmark the performance impact of reduced lowmem address
> > space.
>
> Andi has gone and rotorooted the x86 boot parameter handling in there.

That was me, via Andi, but yep:

> diff -puN arch/i386/kernel/setup.c~x86-add-a-bootparameter-to-reserve-high-linear-address-space arch/i386/kernel/setup.c
> --- a/arch/i386/kernel/setup.c~x86-add-a-bootparameter-to-reserve-high-linear-address-space
> +++ a/arch/i386/kernel/setup.c
> @@ -149,6 +149,12 @@ static char command_line[COMMAND_LINE_SI
>
> unsigned char __initdata boot_params[PARAM_SIZE];
>
> +static int __init setup_reservetop(char *s)
> +{
> + return 1;
> +}
> +__setup("reservetop", setup_reservetop);
> +
> static struct resource data_resource = {
> .name = "Kernel data",
> .start = 0,

Please remove this hunk: it's now junk.

Cheers,
Rusty.
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