Re: [PATCH] cryptoloop

From: Linus Torvalds (
Date: Sat Jul 05 2003 - 12:20:57 EST

On Sat, 5 Jul 2003, Jari Ruusu wrote:
> This tests only low level cipher functions aes_encrypt() and aes_decrypt()
> from linux-2.5.74/crypto/aes.c with all CryptoAPI overhead removed. In real
> use, including CryptoAPI overhead, these numbers should be a little bit
> smaller.
> key length 128 bits, encrypt speed 68.5 Mbits/sec

Note that the issue that started the discussion is somewhat different: the
performance impact of having to map the pages with sleeping kmap's because
of the old virtual-address-pointer interfaces.

That won't even show up on most setups, but it can be rather nasty on big
boxes with lots of ram and several CPU's. Do we care? Possibly not, but I
think from a design standpoint it would be better to not have the problem.


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