On Thu, 2007-07-12 at 17:37 +0200, Ingo Molnar wrote:

We are pleased to announce something we've been working on for some 
time: a finegrained, split-up patch queue of the -rt kernel patch. From 
now on (as of 2.6.22.1-rt2) it will be part of every upstream -rt 
release and it is available from the -rt download site:

   http://redhat.com/~mingo/realtime-preempt/

the -rt patch-queue consists of 374 patches at the moment, which do:

   698 files changed, 27920 insertions(+), 9603 deletions(-)

Is the number of patches relevant to you ? It seems like some patches
could be boken out more. For instance there could be a per-architecture
patch dedicated to converting spinlocks to raw spinlocks .. I was
looking at preempt-realtime-i386.patch ..

Daniel