[Bug 224292] processes are hanging in state ufs / possible deadlock in file system

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224292

--- Comment #6 from Wolfram Schneider <wosch at FreeBSD.org> ---
The machine crashed again, with a kernel panic. Unfortunately, the kernel dump
was not configured. I can access the kernel debug with a VNC web console, and
take some screenshots.

You can see the screenshots here:
https://people.freebsd.org/~wosch/tmp/pr-224292/kernel-panic-deadlock-1/

actually, on
https://people.freebsd.org/~wosch/tmp/pr-224292/kernel-panic-deadlock-1/Screen%20Shot%202017-12-15%20at%2011.57.55.png

you can see on the top procstat, sh and perl5.26.1 are in state "ufs"

and here is the perl process pid 28098 with sys_openat()
https://people.freebsd.org/~wosch/tmp/pr-224292/kernel-panic-deadlock-1/Screen%20Shot%202017-12-15%20at%2011.59.47.png

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