Xen devel - Jun 2008 - [PATCH][HVM] Improve shadow paging performance for 64 bit solaris guests

The following patch provides a ''fast-path'' for
sh_remove_write_access()
for 64 bit Solaris HVM guests. This provides a significant performance
boost for such guests; our testing shows a 200-400% improvement in
microbenchmarks such as fork(), exit(), etc...

The patch was developed against 3.1.4 and I''ve checked that it still
applies against xen-unstable. Could you please also apply the patch to 3.2?

BTW: The change to multi.c isn''t strictly part of the patch, it was
just a
bit of cleanup I spotted when I was developing the patch and testing out
enabling/disabling different optimisations.

Thanks,

Gary
-- 
Gary Pennington
Solaris Core OS
Sun Microsystems
Gary.Pennington@sun.com


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