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Date: Thu, 22 Dec 2016 16:05:53 +0100
From: Hannes Frederic Sowa <>
To: "Jason A. Donenfeld" <>,
Cc: Theodore Ts'o <>, Andy Lutomirski <>,
 Netdev <>, LKML <>,
 Linux Crypto Mailing List <>,
 David Laight <>, Eric Dumazet <>,
 Linus Torvalds <>,
 Eric Biggers <>, Tom Herbert <>,
 Andi Kleen <>, "David S. Miller" <>,
 Jean-Philippe Aumasson <>
Subject: Re: Re: [PATCH v7 3/6] random: use SipHash in
 place of MD5

On 22.12.2016 14:10, Jason A. Donenfeld wrote:
> On Thu, Dec 22, 2016 at 1:47 PM, Hannes Frederic Sowa
> <> wrote:
>> following up on what appears to be a random subject: ;)
>> IIRC, ext4 code by default still uses half_md4 for hashing of filenames
>> in the htree. siphash seems to fit this use case pretty good.
> I saw this too. I'll try to address it in v8 of this series.

This change would need a new version of the ext4 super block, because
you should not change existing file systems.

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