2.6.23-rc9-rt1

From: Steven Rostedt
Date: Tue Oct 02 2007 - 12:12:19 EST


We are pleased to announce the 2.6.23-rc9-rt1 tree, which can be
downloaded from the new location:

http://www.kernel.org/pub/linux/kernel/projects/rt/

Changes since 2.6.23-rc9-rt1

- update to 2.6.23-rc9

- Various cleanups (Daniel Walker)
- convert PICK_OP to PICK_FUNCTION
- use now() in latency_tracer
- have preempt_max_latency in all modes
- latency_hist resetting
- Stop critical timing in idle.

- Deadlock fix in locked list primitives (Peter Zijlstrta)

- RT task wakeup fix (Ingo Molnar)

- New Preempt RCU implementation (Paul E. McKenney and Steven Rostedt)

That last change (new Preempt RCU) is highly experimental!!!
We are currently testing it now, although it has been through some
minor tests already, we haven't declared it stable yet.

This new implementation might shave your cat, eat your dog and
make your children miss the bus and be late for school.
You have been warned! As is said many times on this list
"If it breaks, you get to keep the pieces". So don't come crying
to us if something terrible happens, but please let us know
so that we can try to fix what broke.

That said, please test it as much as possible. We are happy with
the new implementation, but it's still young, and we want to
shake out the problems so it can be pushed up into mainline.


to build a 2.6.23-rc9-rt1 tree, the following patches should be applied:

http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.22.tar.bz2
http://www.kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.23-rc9.bz2
http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.23-rc9-rt1.bz2

The broken out patches are also available.

-- Steve





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