Re: Realtime Preemption, 2.6.12, Beginners Guide?

[Ingo Molnar <mingo@elte.hu>]

* Ingo Molnar <mingo@elte.hu> wrote:

> might be an incorrect printout of stack_left :( The esp looks more or 
> less normal. Not sure why it printed -52.

here's the stack_left calculation:

+       printk("ds: %04x   es: %04x   ss: %04x   preempt: %08x\n",
+               regs->xds & 0xffff, regs->xes & 0xffff, ss, preempt_count());
+       printk("Process %s (pid: %d, threadinfo=%p task=%p stack_left=%ld worst_left=%ld)",
+               current->comm, current->pid, current_thread_info(), current,
+               (regs->esp & (THREAD_SIZE-1))-sizeof(struct thread_info),
+               worst_stack_left);

i cannot see anything wrong in it, but your esp is 0xc04cded0, 
THREAD_SIZE-1 is 0xfff, so the result should be:

	0xed0-sizeof(struct thread_info).

which should not be -52.

	Ingo