netdev - Re: [PATCH] net: fold network name hash

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Message-Id: <200910272002.25384.opurdila@ixiacom.com>
Date:	Tue, 27 Oct 2009 20:02:25 +0200
From:	Octavian Purdila <opurdila@...acom.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, eric.dumazet@...il.com,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH] net: fold network name hash

On Tuesday 27 October 2009 19:22:51 you wrote:

> The full_name_hash does not produce a value that is evenly distributed
> over the lower 8 bits. This causes name hash to be unbalanced with large
> number of names.  A simple fix is to just fold in the higher bits
> with XOR.
> 
> This is independent of possible improvements to full_name_hash()
> in future.
> 

I can confirm that the distribution looks good now for our most common cases. 

Thanks,
tavi
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