Re: [Patch] restore the RCU callback to defer put_task_struct() Re: Problems with 2.6.17-rt8

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On Mon, Aug 14, 2006 at 04:44:23PM -0700, Bill Huey wrote:
> On Mon, Aug 14, 2006 at 10:56:39AM -0700, Robert Crocombe wrote:
> > And yeah, it is a RAID config.  But for extra bonus points, I found a
> > spare SCSI disk and installed Fedora Core 5 and did a 'yum upgrade' to
> > whatever was current as of today.  So it's a single disk config now.
> > Problem still occurs with 't2' patched kernel.
> > 
> > config and dmesg attached, kaboom-like stuff appended.
> 
> It looks like a screw interaction between the latency tracer and the mutex
> code that creates such a wacked out looking stack trace. Unfortunately,
> I've been unsuccessful at reproducing it, so I'm going to focus on a partial
> clean up so that the rtmutex is a bit more friendly to the latency tracer.
> 
> This is kind of a pain.

I'm high, the latency tracer is fine. I'm going to look at the mutex code more.

bill

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