* Arne Jansen<lists@xxxxxxxxxxxxxx> wrote:
From the timing I see I'd guess it has something to do with the
scheduler kicking in during printk. I'm neither familiar with the
printk code nor with the scheduler.
Yeah, that's the well-known wake-up of klogd:
actually ... that's not the klogd wake-up at all (!). I so suck today
at bug analysis :-)
It's the console lock()/unlock() sequence, and guess what does it:
and the vt.c code in a dozen places.
So maybe it's some sort of tty related memory corruption that was
made *visible* via the extra assert that the scheduler is doing? The
pi_list is embedded in task struct.
This would explain why only printk() triggers it and other wakeup
Now, i don't really like this theory either. Why is there no other
type of corruption? And exactly why did only the task_struct::pi_lock
field get corrupted while nearby fields not? Also, none of the fields
near pi_lock are even remotely tty related.