Re: [PATCH] move put_task_struct() reaping into a thread [Re: 2.6.18-rt1]

Bill Huey
2006-09-21T07:35:41Z

On Thu, Sep 21, 2006 at 09:22:16AM +0200, Ingo Molnar wrote:
> * Bill Huey <billh@gnuppy.monkey.org> wrote:
>
> > Also, triggering a panic() at the beginning of the rt mutex acquire
> > was very useful since it made "in_atomic()" violations an explicit
> > error stopping the machine. Stack traces started to get really crazy
> > in this preemptive kernel with all sorts of things running unlike the
> > non-preemptive kernel and it was time consuming to figure out the real
> > stuff from the noise in the stack trace.
>
> well you should absolutely have serial console if you effectively want
> to hack the Linux kernel. And in the serial console log you should
> search for stacktraces top-down, and concentrate on the first one - any
> subsequent one might be collateral damage of the first one.

Of course I did that. I'm not that stupid. :) The stack traces, even with
your above suggestions were too many and I had to break it down a bug at
a time, stack trace at a time, since I realize problems earlier could
clash and trigger other unrelated problems.

It was even problematic with the serial console on which is why I did
that. Maybe it was an artifact of having both the serial console and video
consoles on ?

bill