* Steven Rostedt <[email protected]> wrote:
> + printk("| This is not a BUG\n");
> + printk("| turn off CONFIG_DEBUG_STACK_OVERFLOW if you don't want this\n");
i added the patch below - we want to know about too high stack
footprints.
Ingo
Index: linux-rt.q/kernel/latency.c
===================================================================
--- linux-rt.q.orig/kernel/latency.c
+++ linux-rt.q/kernel/latency.c
@@ -414,10 +414,17 @@ static void show_stackframe(void)
static notrace void __print_worst_stack(void)
{
+ unsigned long fill_ratio;
printk("----------------------------->\n");
- printk("| new stack-footprint maximum: %s/%d, %ld bytes (out of %ld bytes).\n",
+ printk("| new stack fill maximum: %s/%d, %ld bytes (out of %ld bytes).\n",
worst_stack_comm, worst_stack_pid,
MAX_STACK-worst_stack_left, (long)MAX_STACK);
+ fill_ratio = (MAX_STACK-worst_stack_left)*100/(long)MAX_STACK;
+ printk("| Stack fill ratio: %02ld%%", fill_ratio);
+ if (fill_ratio >= 90)
+ printk(" - BUG: that's quite high, please report this!\n");
+ else
+ printk(" - that's still OK, no need to report this.\n");
printk("------------|\n");
show_stackframe();
-
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