panic: double fault with 11.0-CURRENT r258504

[Konstantin Belousov]

On Wed, Nov 27, 2013 at 01:13:41AM -0800, Don Lewis wrote:
> On 27 Nov, Konstantin Belousov wrote:
> > On Wed, Nov 27, 2013 at 12:22:27AM -0800, Don Lewis wrote:
> >> It took a while, but I just got another double fault, though this one is
> >> somewhat different.  This time it trapped in cpu_switch(), which
> >> resulted in calls to
> >> trap()->printf()->...->putchar()->msgbuf_addstr()->_mtx_lock_spin_flags()
> >> where it trapped again.
> >> 
> >> Sitting at DDB prompt ...
> > 
> > Does 'show allpcpu' work ?
> 
> Yup.  For both CPUs, curthread == idlethread, both CPUs have the same
> curpcb.  What is "dynamic pcpu"?  The values differ considerably between
> the two CPUs.

Are you sure about curpcb being the same for two CPUs ? This is rather
broken.  The best would be to show the actual ddb output.

Dynamic pcpu is in fact 'static' pcpu which is allocated for modules.
It must be per-cpu, so different values are correct.
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