netdev - Re: Extensible hashing and RCU

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Message-ID: <f2b55d220702200707t605be092hf02a9ded1c98a264@mail.gmail.com>
Date:	Tue, 20 Feb 2007 07:07:16 -0800
From:	"Michael K. Edwards" <medwards.linux@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	dada1@...mosbay.com, johnpol@....mipt.ru, akepner@....com,
	linux@...izon.com, netdev@...r.kernel.org, bcrl@...ck.org
Subject: Re: Extensible hashing and RCU

On 2/20/07, David Miller <davem@...emloft.net> wrote:
> Actually someone (I think it was Evgeniy in fact) made such
> comparisons and found in his studies that not only does the current
> ehash xor hash function distribute about as well as jenkins, it's
> significantly cheaper to calculate :-)

However, it's vulnerable to hash collision attacks, which the Jenkins
hash (used as a poor man's HMAC with a boot-time random salt) is not.
But if you don't care about DoS ....

Cheers,
- Michael
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