Re: Big memory, no struct page allocation

[William Lee Irwin III <wli@holomorphy.com>]

On Sun, Jun 23, 2002 at 04:55:58PM +0800, David Chow wrote:
> Hi, I've got a silly but serious question. I want to allocate a large 
> buffer (>512MB) in kernel. Normally you use __get_free_page and handle 
> it with page pointers. But when get to very large (say 1024MB), I will 
> need to use 2 level of page pointer indirection to carry the page 
> pointer array. I also find the total size of page struct is quite large 
> when using lots of pages, what I want is to use memory pages without 
> struct page, is this possible? By the way, can I use lots of memory in 
> the kernel, something like 1GB of memory allocation when physically RAM 
> available? Please give advise. Thanks.

Try allocating it at boot-time with the bootmem allocator.


Cheers,
Bill
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