panic: double fault with 11.0-CURRENT r258504
Don Lewis
truckman at FreeBSD.org
Wed Nov 27 10:49:20 UTC 2013
On 27 Nov, I wrote:
> On 27 Nov, Konstantin Belousov wrote:
>> 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.
>
> It turns out that they are different:
> 0xe4f62d60
> 0xe4f65d60
>
> Screenshot here: <http://people.freebsd.org/~truckman/doublefault1.JPG>
And screenshot of the stack trace here:
<http://people.freebsd.org/~truckman/doublefault2.JPG>
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