Messages in this thread |  | | | Date | Mon, 31 May 2010 21:04:00 +0200 | | From | Andi Kleen <> | | Subject | Re: [dm-devel] [PATCH] DM-CRYPT: Scale to multiple CPUs |
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> I mean how it is implemented now in crypto API, and I was almost > sure that aes-ni acceleration code uses cryptd (iow real asynchronous processing) > and also that not all CPU cores can run these instruction in parallel.
I think you can configure it to use cryptd (or pcrypt), but it's not default and usually higher overhead.
Each CPU core has its own support for AES-NI (it's part of the SSE units), there's no shared crypto hardware between cores.
There are other systems with separate AES units, but they are considerably more obscure.
-Andi -- ak@linux.intel.com -- Speaking for myself only.
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