Re: [PATCH 4/4] vmm: Use a static memory map

KAMEZAWA Hiroyuki
2006-10-13T00:56:40Z

On Thu, 12 Oct 2006 12:18:28 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> - The plan is to further generalize the virtual mem map support
> in the Linux kernel. With this patch the virtual memory map
> is more independent from VMALLOC.
This purpose is great. I like this patch.

> +#define VIRTUAL_MEM_MAP_SIZE (1UL << (IA64_MAX_PHYS_BITS - PAGE_SHIFT +\
> + STRUCT_PAGE_ORDER))

I'm not sure but Is this size of virtual-memory able to be mapped by any configs ?

> #else
> -# define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
> +#define VIRTUAL_MEM_MAP_SIZE 0
> #endif
>
> +#define VMALLOC_START (VIRTUAL_MEM_MAP + VIRTUAL_MEM_MAP_SIZE)
> +#define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
> +
And, (1UL << (4*PAGE_SHIFT-9)) - VIRTUAL_MEM_MAP_SIZE is real VMALLOC size.
I think.

-Kame