[patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U4

[Ingo Molnar]

i have released the -U4 PREEMPT_REALTIME patch:

   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U4

this is a fixes-only release, and it is still experimental code.

Changes since -U3:

 - crash fix: fix the rtc_lock related crash reported by Bill Huey, the 
   rtc_lock is now a raw spinlock again.

 - crash fix: avoid recursion into timer code when PREEMPT_TIMING is 
   enabled.

 - crash/printout fix: revert some of selinux's locks back to raw 
   spinlocks. This could fix the problems reported by Mark H. Johnson, 
   Adam Heath.

 - build fix: fix the compilation problems reported by Lee Revell

 - debug feature: implemented 'print backtrace on all CPUs' on SMP 
   systems, SysRq+L will trigger it.

 - build cleanup: restructure the debug config options. This should 
   resolve the build problems and incompatible debug-options
   problems reported.

 - cleanup: move definitions around, turn on generic rwlocks instead of
   the x86-specific version.

i think all bugs that were reported with logs are fixed in -U4. Please
re-report any issue that might remain.

to create a -U4 tree from scratch the patching order is:

   http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.8.tar.bz2
 + http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.9-rc4.bz2
 + http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/2.6.9-rc4-mm1.bz2
 + http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U4

	Ingo
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