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Subject: [Bug 205163] Periodic jobs triggering panics on ZFS host with jails
Date: Wed, 09 Dec 2015 17:39:33 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205163

--- Comment #2 from dustinwenz@ebureau.com ---
Note I see this with a kernel config based on GENERIC, with these options
added:

device pf
device pflog
device pfsync
options ALTQ
options ALTQ_CBQ
options ALTQ_RED
options ALTQ_RIO
options ALTQ_HFSC
options ALTQ_PRIQ
options ALTQ_NOPCC

There are also two kernel patches applied from these PRs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=189870
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594

The last patch might be interesting here because the stack trace below hits
lines (1077-1078 in dmu_tx.c) modified by the arc patch:

        min_tx_time = zfs_delay_scale *
            (dirty - delay_min_bytes) / (zfs_dirty_data_max_internal - dirty);

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