From mboxrd@z Thu Jan 1 00:00:00 1970 From: greg@kroah.com (Greg KH) Date: Thu, 27 Oct 2011 06:52:53 +0200 Subject: how to check kernel is configured with preemption or not In-Reply-To: References: <20111024043809.GD3951@kroah.com> Message-ID: <20111027045253.GB609@kroah.com> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org 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