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We are pleased to announce the next update to our new preempt-rt
   - forward to

   - large number of RCU assumption fixes vs. cred and tasklist_lock

   - Priority Inheritance POSIX compliance fix

   - workaround for Priority Protection POSIX compliance problem

   - misc. fixlets here and there

It took quite a while to get this update out for various reasons:

   - mainline merge of the locking infrastructure changes which are a
     further milestone on the way to full rt integration. That merge
     will shave off a large portion of the rt patch (don't worry, we
     have enough new and exiting stuff in the pipeline to keep the
     patch size large enough)

  - fixing RCU assumptions in mainline and backport to 31-rt

  - lots of brain twisting around the POSIX scheduling policy
    compliance problems which got reported vs. Priority

  - an extended christmas break and the resulting email backlog

  - our new housemate:

Further plans:

  - a last big feature for 31-rt is pending, which is worth a separate
    release: Nick Piggins VFS scalability patches. I'm still running
    tests on that, so no promise.

  - I'm going to switch 31-rt into maintaince mode (with or without
    the VFS patches) and concentrate on getting .33-rcX-rt out. Yes,
    there will be no .32-rt. The reason is simply that the locking
    changes which got merged into .33 are making my life easier and
    are the base to sort out more ready for the mainline stuff.

Download locations: (temporary out of sync)

Git release branch:
   git:// rt/2.6.31
Git development branch:
   git:// rt/head

Information on the RT patch can be found at:

to build the tree, the following patches should be

Enjoy !

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