On Jun 20, 2008, at 6:23 PM, Benjamin Herrenschmidt wrote:
On Fri, 2008-06-20 at 11:36 -0500, Kumar Gala wrote:
This is a work in progress towards make lwsync fixed up at
runtime. The
patch is based (requires) the module refactoring patch. Some of
this code
should be reworked based on the code patching work from Michael.
Also,
ppc64 and vdso support needs a bit of cleaning up.
Some questions:
* How do we determine at runtime if we need to convert sync to
lwsync.
This is simliar to cpu_feature but has the issue that cpu_feature
is about
either having code in or not.
* Do we simplify the section of fixup information and remove the
mask and
value since we don't use them and they double the size of the section
Remind me why we want to do that ? ie. can't we just use lwsync
unconditionally ? It's supposed to degrade to sync on CPUs that don't
support it, or is that broken on some parts ?
I believe its broken on e500v1/v2. However I'll double check.
- k
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