kfree causing high latency on 3.4.4-rt13

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Hi all,

I'm running 3.4.4-rt13 on my systems, and while the realtime
performance is great, I occasionally see non-realtime processes block
for several seconds. Running latencytop, it looks like the kfree
kernel process is the worst offender. Does anyone have advice on how I
can troubleshoot this further?

I've poked around the intercatz, but either my google-fu is weak, or
there aren't many other people having this problem.

Thanks,
Austin Hendrix
Robot Systems Administrator
Willow Garage
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