Re: Questions about alloc_large_system_hash() and TLB entries

[David S. Miller]

From: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Date: Mon, 30 Jan 2006 10:03:40 +0100

> What would be the needed changes in the code to get both :
> 
>    - Allocate ram equally from all the nodes of the machine
> 
>    - Use large pages (2MB) to lower TLB stress

These two desires are mutually exclusive, I think.

If you want an 8MB hash table, for example, with 2MB mappings
you could use memory from a maximum of 4 nodes since the
2MB chunks have to be physically 2MB aligned and 2MB contiguous.
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