[RFC][CFT] GEOM direct dispatch and fine-grained CAM locking

[Alexander Motin]

On 04.09.2013 19:31, Olivier Cochard-Labbé wrote:
> On Wed, Sep 4, 2013 at 9:01 AM, Alexander Motin <mav at freebsd.org> wrote:
>>
>>> - HP EliteBook 8460p (amd64: r255188) with DVD replaced by a second
>>> hardrive (where fbsd is installed): It crash just after the message
>>> "GEOM: new disk ada1" during boot
>>>
>>> screenshot of the crash screen:
>>> http://goo.gl/tW1VIx
>>>
>>> A little more information:
>>> addr2line -e /boot/kernel/kernel.symbols 0xffffffff8083abd3
>>> /usr/src/sys/geom/geom_io.c:129
>>
>>
>> Unfortunately I can't reproduce that and have not enough clues. It may be
>> specific to some GEOM class. Could you describe/show all GEOM topology, file
>> systems, etc. you have there?
>> gpart show
>> sysctl kern.geom.confxml

I've found and fixed possible double request completion, that could 
cause such symptoms if happened. Updated patch located as usual:
http://people.freebsd.org/~mav/camlock_patches/camlock_20130905.patch

-- 
Alexander Motin