Re: [RFC PATCH 1/4] powerpc 2.6.16-rt17: to build on powerpc w/ RT

On Thu, 2006-08-17 at 02:26 +0200, Benjamin Herrenschmidt wrote:

quoted

Hey Ben,
	I appreciate your looking over my patch. You are correct, the
conversion is a bit rough and I've not yet been able to work on the
powerpc vDSO, although I'd like to get it working so any help or
suggestions would be appreciated (is there a reason the vDSO is written
in ASM?).

If you have any other concerns w/ that patch, or the generic timekeeping
code, please let me know and I'll do what I can to address them.

Well, I've been wanting to look at your stuff and possibly do the
conversion for some time, provided we don't lose performances ... Our
current implementation is very optimized to avoid even memory barriers
in most cases and I doubt we'll be able to be as fine tuned using your
generic code, thus it's a tradeoff decision that we have to do. But
then, I need to look into the details before doing any final
statement :)

Ok, although do let me know if you see places where the generic code
could use any of the optimizations used in powerpc.

thanks
-john