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Subject: Re: panics related to nfit_test?
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From: Linda Knippers <linda.knippers@hpe.com>
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Date: Fri, 7 Apr 2017 16:28:57 -0400
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To: Dan Williams <dan.j.williams@intel.com>
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On 04/07/2017 01:12 PM, Linda Knippers wrote:
> On 04/07/2017 12:44 PM, Dan Williams wrote:
>> On Fri, Apr 7, 2017 at 6:28 AM, Linda Knippers <linda.knippers@hpe.com> wrote:
>> I've seen reports of this crash
>> signature from the team trying to integrate the ndctl unit tests into
>> the 0day kbuild robot, but I have thus far been unable to reproduce
>> them. On my system if I do:
>>
>> # modprobe nfit_test
>> # rmmod nfit_test
>> rmmod: ERROR: Module nfit_test is in use
>>
>> Are you saying you are able to remove nfit_test on your system without
>> first disabling regions?
> 
> No, sorry.  I missed that step in my description.  I'm doing 'ndctl disable-region all'
> before the rmmod.

I've been doing a bit more testing and once, I had 'ndctl check' make it through
all the tests and pass.  A few times I've made it part way through the tests before
I hit the panic.  However, if I just modprobe the modules, disable the regions,
and then rmmod nfit_test, it panics for me 100% of the time.  Try this in a script.

modprobe nfit
modprobe dax
modprobe dax_pmem
modprobe libnvdimm
modprobe nd_blk
modprobe nd_btt
modprobe nd_e820
modprobe nd_pmem
lsmod |grep nfit
modprobe nfit_test
lsmod |grep nfit
ndctl disable-region all
rmmod nfit_test

-- ljk

> 
> -- ljk
> 
> 

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