Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.

On Mon, Aug 04, 2008 at 03:49:01PM +0100, David Woodhouse wrote:

And even for people who don't care about that, it doesn't look
particularly good. It looks like btrfs would need either to keep setting
up a crypto context and then tearing it down, or have a pool of
long-standing contexts and do some kind of locking on them -- neither of
which seem particularly optimal compared with just calling into
libcrc32c.

No you don't have to set things up every time you use crc32c.
The crypto interface lets you have a single tfm that can be
used by multiple users simultaneously.  For ahash algorithms
all the state is stored in the request which can stay on the
stack.

Cheers,
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