Intermittent hangs in vmem_periodic()

[hiren panchasara]

+jeff


On Thu, Sep 12, 2013 at 11:17 AM, Gleb Smirnoff <glebius at freebsd.org> wrote:

> On Thu, Sep 12, 2013 at 09:31:17AM -0700, hiren panchasara wrote:
> h> > > h> PMC: [INSTR_RETIRED_ANY] Samples: 117647 (100.0%) , 6885
> unresolved
> h> > > h>
> h> > > h> %SAMP CALLTREE
> h> > > h>  75.9 fork_exit at kernel taskqueue_thread_loop
> taskqueue_run_locked
> h> > > h> vmem_periodic(75.9%)
> h> > >
> h> > > You probably got DIAGNOSTIC in your kernel config.
> h> >
> h> > Yes. And I've always had that. Never been a problem before. What has
> h> > changed?
> h> >
> h>
> h> Thanks Gleb.
> h> I've removed DIAGNOSTIC and the problem is gone now.
> h>
> h> But the way system was behaving with DIAGNOSTIC, its unusable.
>
> Please report that to Jeff. With DIAGNOSTIC the system can be slower,
> more chatty on console, but should be usable.
>

Exactly.

Thanks Gleb.

Jeff: Not sure if you are subscribed to this list.
http://lists.freebsd.org/pipermail/freebsd-current/2013-September/044487.html

cheers,
Hiren