Hi...
On Thu, Apr 10, 2008 at 2:32 PM, bhanu nani <bhanu.lnxnew@xxxxxxxxx> wrote:
> Hi all,
>
> I am trying to test kernel preemption in my driver. When I first
> compiled the Linux kernel and tested it, I found it to be
> non-preemptible. Later I realised that my kernel was build with
> premption disabled. I enabled kernel premption in processort section
> i.e. CONFIG_PREEMPT and rebuild it.
> Even with change in the kernel preemption does not work. I am trying
> it on my latest stable kernel.
>
> Test code:
> --------------
> read()
> {
> if(down_interruptible())
> return error;
> mdelay(10000);
> up();
> }
>
> With this code in place, I try to do a 'CTRL+C' when it hangs at that delay.
> It does not respond to my 'CTRL + C'.
Is that user space or kernel space code?
regards,
Mulyadi
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