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Subject: [Bug 204949] panic: mtx_lock of spin mutex @
 /usr/src/head/sys/kern/vfs_subr.c:512
Date: Wed, 02 Dec 2015 19:09:21 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204949

--- Comment #7 from Jason Unovitch <junovitch@freebsd.org> ---
(In reply to Konstantin Belousov from comment #6)
> What does 'M' mean in your kernel revision ? What changes did you apply ?

I have applied the patch in bug 158160 to let coretemp recognize my Atom CPU. 
This only impacts my home router but I have it applied to my source for this
NAS machine as well even though it is a no-op there.  The relevant files
changed:
M       share/man/man4/coretemp.4
M       sys/dev/coretemp/coretemp.c

I realize the core dumps are rather useless now without the kernel.debug.  I'm
learning as I go here.  Let me know what else you may need.

> From the core at the reference above, in kgdb do 'frame 12\nprint *mp' and post the result.

https://people.FreeBSD.org/~junovitch/working/PR204949/r291461M-GENERIC-crashdump/frame12-printmp.txt

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