Re: [BUG RT] 2.6.25.8-rt7 on 8-way

From: Steven Rostedt <rostedt@xxxxxxxxxxx>
Date: Mon, 30 Jun 2008 08:37:25 -0400 (EDT)

On Sun, 29 Jun 2008, Sven-Thorsten Dietrich wrote:

On Sun, 2008-06-29 at 16:32 -0500, Noah Watkins wrote:

My kernel is very, very noisy with the following bug:

- Full dmesg below
- Please CC me

I found this as well (adding Paul).

If you disable CONFIG_PREEMPT_RCU_BOOST, does it go away?

Turning off CONFIG_RCU_TRACE will also make it go away. The bug is that
the tracing of the RCU boost code uses smp_processor_id while the RCU
boost code is not in an atomic section.

Paul has a fix for this already, and will be out in the next releases.

-- Steve
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References:
- [BUG RT] 2.6.25.8-rt7 on 8-way
  - From: Noah Watkins
- Re: [BUG RT] 2.6.25.8-rt7 on 8-way
  - From: Sven-Thorsten Dietrich

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