The patches are basically ports of OpenSolaris' code and should improve write performance and stat() syscall performance. The patches are available for testing on 9-CURRENT and 8-STABLE.
Interesting information for the first patch:
The source states, that with this change they archieved a speedup
of: "50% Improved OLTP Performance, 70% Reduced Variability, 200%
Improvement on MS Exchange"
and for the second:
- better ACL caching and speedup of the ACL permission checks
- lowered mutex contention in the read/writer lock (rrwlock)
- several bugfixes
Interested users are invited to test them so they can be imported as soon as possible!