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Re: [dm-devel] [PATCH] DM-CRYPT: Scale to multiple CPUs



On Wed, Jun 02, 2010 at 01:25:11AM -0400, Mikulas Patocka wrote:
>
> Are you sure that you know what you're talking about? pcrypt_alloc 
> contains this:
> switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
> case CRYPTO_ALG_TYPE_AEAD:
>         return pcrypt_alloc_aead(tb);
> }
> 
> return ERR_PTR(-EINVAL);
> --- so for anything other byt AEAD it returns -EINVAL.

So someone needs to write the ablkcipher plugins for pcrypt.

This is the whole point of pcrypt, to implement parallelisation
exactly once, in the crypto layer.

> For what? For avoiding cache bounces? But the encrypting is 
> order-of-magnitude slower than memory speed.

Have you benchmarked the Nehalem AES performance lately?

Cheers,
-- 
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