Re: show_mem() for ia64 discontig takes a really long time on large systems.

From: Dave Hansen <haveblue_at_us.ibm.com>
Date: 2006-03-29 06:34:30
On Tue, 2006-03-28 at 14:23 -0500, Bob Picco wrote:
> This could work but you need to be cautious because struct page for ia64
> isn't a power of 2. Also this would have to be done conditionally because 
> SPARSEMEM doesn't require it but of course VIRTUAL_MEM_MAP does. 

If it is done correctly it at least wont _hurt_ sparsemem.  It should
save a bunch of (probably cached) references into the mem_section[]
array, along with a good number of arithmetic operations from each
pfn_valid().

-- Dave

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Received on Wed Mar 29 06:35:11 2006

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