Date: Mon, 30 Jan 2006 01:22:59 -0800 (PST)
Message-Id: <20060130.012259.78361400.davem@davemloft.net>
To: dada1@cosmosbay.com
Cc: bcrl@kvack.org, akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: Questions about alloc_large_system_hash() and TLB entries
From: "David S. Miller" <davem@davemloft.net>
In-Reply-To: <43DDD66C.4060201@cosmosbay.com>
References: <20060129200504.GD28400@kvack.org>
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	<43DDD66C.4060201@cosmosbay.com>
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From: Eric Dumazet <dada1@cosmosbay.com>
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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