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kern/55272: userland watchdog process may be outstalled

>Number:         55272
>Category:       kern
>Synopsis:       userland watchdog process may be outstalled
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 18 15:55:00 +0000 2020
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.63
The NetBSD Foundation, Inc.
System: NetBSD 9.99.63 NetBSD 9.99.63 (UNPLUGED) #322: Mon May 18 14:20:23 CEST 2020 evbarm
Architecture: earm
Machine: evbarm
Since some weeks a userland watchdog with something like:

	wdogctl=YES wdogctl_flags="-u mvsoctmr0"

in /etc/rc.conf may be outstalled by running busy tests, like the libarchive
test program. The timer has 21 second period.

See above, just run atf tests (cd /usr/tests && atf-run)


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