Re: Big memory, no struct page allocation

[David Chow <davidchow@shaolinmicro.com>]

William Lee Irwin III wrote:

>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
>  
>
Thanks for suggestions, you mean this will allow no struct page or can 
use memory more than 1GB? Please make clear on direction, I would love 
to know. Thanks.

regards,
David


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