[dm-crypt] anyone already tried the parallel crypto engine

[dm-crypt] anyone already tried the parallel crypto engine

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 336 bytes --]

Hey...

Just wondered whether anyone has already tried CONFIG_CRYPTO_PCRYPT
which was introduced with 2.6.34, IIRC.

It's still marked as experimental, so I'm a bit reluctant in trying it
out in my production systems...

Should it work with all the algo/cipher mode combinations? And with
dm-crypt itsef?


Cheers,
Chris.

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5672 bytes --]

Re: [dm-crypt] anyone already tried the parallel crypto engine

[Mario 'BitKoenig' Holbe]

Christoph Anton Mitterer <calestyo@scientia.net> wrote:
> Just wondered whether anyone has already tried CONFIG_CRYPTO_PCRYPT
> which was introduced with 2.6.34, IIRC.

Quite surely not :)

> Should it work with all the algo/cipher mode combinations? And with
> dm-crypt itsef?

Yes, it should. You just have to code it :)
Currently it only implements AEAD.


regards
   Mario
-- 
I've never been certain whether the moral of the Icarus story should
only be, as is generally accepted, "Don't try to fly too high," or
whether it might also be thought of as, "Forget the wax and feathers
and do a better job on the wings."            -- Stanley Kubrick

Re: [dm-crypt] anyone already tried the parallel crypto engine

[Milan Broz]

On 07/26/2010 11:53 PM, Christoph Anton Mitterer wrote:
> Just wondered whether anyone has already tried CONFIG_CRYPTO_PCRYPT
> which was introduced with 2.6.34, IIRC.

PCRYPT is currently not useful for dm-crypt at all, do not waste time with it.
I hope one day it will be usable and support all algorithms:-)

There was a lot of discussion regarding dm-crypt scaling, middle term
solution for now - please read this
http://thread.gmane.org/gmane.linux.kernel/993158/
(Note, it is not universal solution - it will never distribute work
to another cpu. I wonder how this will scale with pcrypt...)

I'll send more info here when the patches will be in upstream tree
(there are still some minor problems I have open in my local tree,
I hope it will be in upstream in next few days - it must go through
device-mapper maintainer review now).

Milan