Subject: Re: Adding opencrypto, crypto acceelerator to GENERIC kernels?
To: Jonathan Stone <jonathan@DSG.Stanford.EDU>
From: Jason Thorpe <firstname.lastname@example.org>
Date: 11/18/2003 16:27:48
[ port-i386 and tech-kern trimmed, tech-userlevel on bcc, thread moved
to tech-crypto ]
On Nov 18, 2003, at 4:07 PM, Jonathan Stone wrote:
> Below is the patch I posted to tech-crypto in August. I know Jason
> has tried it; last call for feedback before I commit this, too...
> Please send me an explicit cc: with any feedback.
After thinking about this a little bit, I think I would like for the
libcrypto stuff to only use /dev/crypto if acceleration hw is available
for the requested algorithm.
This is because using the kernel for the sw crypto is a neat little way
for things like ssh to cause a kernel thread that will not be preempted
to suck up a lot of CPU time. I'm not sure I like that very much.
Is this pretty easy to handle in the OpenSSL "engine" support?
-- Jason R. Thorpe <email@example.com>