Hi.
On Tue, 2006-08-29 at 13:59 +0900, Paul Mundt wrote:
> On Tue, Aug 29, 2006 at 07:48:25AM +1000, Nigel Cunningham wrote:
> > For Suspend2, we ended up converting the LZF support to a cryptoapi
> > plugin. Is there any chance that you could use cryptoapi modules? We
> > could then have a hope of sharing the support.
> >
> Using cryptoapi plugins for the compression methods is an interesting
> approach, there's a few other places in the kernel that could probably
> benefit from this as well, such as jffs2 (which at the moment rolls its
> own compression subsystem), and the out-of-tree page and swap cache
> compression work.
>
> Assuming you were wrapping in to LZF directly prior to the cryptoapi
> integration, do you happen to have before and after numbers to determine
> how heavyweight the rest of the cryptoapi overhead is? It would be
> interesting to profile this and consider migrating the in-tree users,
> rather than duplicating the compress/decompress routines all over the
> place.
I was, but I don't have numbers right now. I'm about to go out, but will
see if I can find them when I get back later. From memory, it wasn't a
huge change in terms of lines of code.
Regards,
Nigel
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