Re: WARN_ON noise in 2.5.63's kernel/sched.c:context_switch

From: William Lee Irwin III (wli@holomorphy.com)
Date: Tue Feb 25 2003 - 01:37:39 EST


On Tue, Feb 25, 2003 at 03:35:22PM +0900, Miles Bader wrote:
> I'm getting a bunch of stack dumps from the WARN_ON newly added to
> kernel/sched.c:context_switch:
> if (unlikely(!prev->mm)) {
> prev->active_mm = NULL;
> WARN_ON(rq->prev_mm);
> rq->prev_mm = oldmm;
> }
> The thing is, I'm hacking on uClinux, so I don't have an MMU, and the mm
> stuff is purely noise. What's the best way to squash this warning?
> [Of course I'd like to just trash all the MM manipulation -- for me,
> `context_switch' should really _just_ do `switch_to' -- but I'd settle
> for just not having stack dumps litter my console output...]

This means there's some kind of trouble happening, i.e. the rq->prev_mm
pointer is not NULL when it should be.

Tracking down the root cause would better serve you.

-- wli
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Fri Feb 28 2003 - 22:00:27 EST