* Lee Revell <rlrevell@joe-job.com> wrote:

> On Mon, 2004-08-09 at 22:06, Lee Revell wrote:
> 
> > Same results here, the mlockall problem is not fixed by -O4:
> 
> Correction, those traces did not involve mlockall at all, but
> kmap_atomic and get_user_pages.
> 
> Here is another one I got starting jackd.  Never seen it before today.
> 
> (jackd/778): 14583us non-preemptible critical section violated 1100 us
> preempt threshold starting at schedule+0x55/0x5a0 and ending at
> schedule+0x2ed/0x5a0

can you trigger similar latencies via the attached mlock testcode?
(written by Florian. Run it as root.)

	Ingo