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

Bill Huey
2006-08-15T10:43:36Z

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