how to check kernel is configured with preemption or not

[Greg KH]

On Wed, Oct 26, 2011 at 11:52:07PM +0530, sri wrote:
> Am working on a problem where the system hanging after some unequal
> intervals, with the below o/p printing on the console,
> Though this might be mostly tighten to the click router module am using, but
> I see the do_IRQ in the stack trace multiple times.
> This brought some suspicious questions to me why so many times the module is
> interrupted.
> Ealier I was running with centos5.3 kernel, now running with centos5.5
> kernel (2.6.18-194).

That is a _very_ old kernel release, please use something more modern.

Anyway, this is a bug in the module you are using, there's not anything
that preempt vs. non-preempt that is handling this.  Please work with
the company providing the code to fix the bug in their driver.

greg k-h