Re: USB3 express card panics on 9.0-RC1

On 11/03/2011 11:51, Jan Henrik Sylvester wrote:
> On 11/03/2011 09:27, Hans Petter Selasky wrote:
>> On Wednesday 02 November 2011 16:22:20 Jan Henrik Sylvester wrote:
>>> I have bought a "Super-speed Express Card To USB 3.0 1-Port" to connect
>>> an USB3 hard disk to my Thinkpad T510, which only has USB2.
>>>
>>> Trying to hot plug the express card did nothing, but I guess that is
>>> expected. Hence, I booted with the express card already inserted, only
>>> to receive a panic upon xhci0 initialization, see below.
>>>
>>> This is on FreeBSD 9.0-RC1/amd64 with a generic kernel installed from
>>> the official DVD.
>>>
>>> I guess I could test 226803 mentioned in
>>> http://lists.freebsd.org/pipermail/freebsd-usb/2011-October/010746.html
>>> , which happened after RC1, but from the commit message, it only fixes
>>> suspend and resume.
>>>
>>> As I do not have much time now, should I test 226803, find a Linux CD to
>>> actually identify the device, or anything else?
>>>
>>> Cheers,
>>> Jan Henrik
>>>
>>>
>>> usbus0: 480 Mbps High Speed USB v2.0
>>>
>>> Fatal trap 12: page fault while in kernel mode
>>> cpuid = 0; apic id = 00
>>> fault virtual address = 0x18
>>> fault code = supervisor write data, page not present
>>> instruction ponter = 0x20:0xffffffff806e80aa
>>> stack pointer = 0x28:0xffffff810ee50bc0
>>> frame pointer = 0x28:0xffffff810ee50bf0
>>> code segment = base 0x0, limit 0xfffff, type 0x16
>>> = DPL 0, pres 1, long 1, def32 0, gran 1
>>> processor eflags = interrupt enabled, resume, IOPL = 0
>>> current process = 15 (xhci0)
>>> trap number = 12
>>> panic: page fault
>>> cpuid = 0
>>> Uptime = 1s
>>> Automatic reboot in 15 seconds - press a key on the console to abort
>>
>> Hi,
>>
>> This looks like a NULL-pointer issue inside "xhci_configure_msg()" which
>> probably should be easy to fix.
>>
>> Could you compile and boot a kernel with kernel debugging enable so
>> that you
>> get a backgtrace?
>
> I have not done this before.
>
> The GENERIC kernel already contains "makeoptions DEBUG=-g" (at least it
> is in /usr/src/sys/amd64/conf/GENERIC and there are all this large
> /boot/kernel/*.symbols). Is there anything else needed? (I do not need
> all the stuff that Ken Smith took out just before RC1 in r226405 just to
> get a trace, since I do not want to do online debugging, or do I need it
> anyhow?)
>
>  From
> http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html
> , I thought that setting dumpdev="AUTO" in /etc/rc.conf was enough to
> get a dump in /var/crash/ after the next boot to multiuser. That does
> not seem to be the case for me. What else do I have to do?

After reading a bit more, I still do not know why I do not get a crash 
dump with dumpdev="AUTO" (and /var/crash/ having enough space for a full 
memory dump). Is it too early during boot for dumpon to be set?

After reading http://www.unixguide.net/freebsd/faq/18.13.shtml , I found 
that ffffffff806e8040 t usb_process is the last symbol before 
instruction pointer = 0x20:0xffffffff806e80aa. Does this help?

Cheers,
Jan Henrik