https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203864
Bug ID: 203864
Summary: ZFS deadlock between zfs send, zfs rename and ctrl-C
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: pe...@freebsd.org
I tried to abort a zfs send:
07:06:26 2.28G zroot/j/jails/admin-svn@daily.31
07:06:27 2.29G zroot/j/jails/admin-svn@daily.31
^C
load: 1.27 cmd: zfs 72318 [tx->tx_sync_done_cv] 101.46r 0.00u 1.89s 0% 4212k
load: 0.84 cmd: zfs 72318 [tx->tx_sync_done_cv] 127.51r 0.00u 1.89s 0% 4212k
load: 0.84 cmd: zfs 72318 [tx->tx_sync_done_cv] 127.98r 0.00u 1.89s 0% 4212k
It turns out the freebsd-snapshot cron was running at that very instant and it
lead to a deadlock:
# ps -axl | grep tx
0 74866 72290 0 20 0 40336 3528 tx->tx_s D - 0:00.00 zfs
rename zroot/j/jails/monitor@hourly.15 zroot/j/jails/monitor@hourly.16
0 72318 69290 0 20 0 42520 4228 tx->tx_s DE+ 0 0:01.89 zfs send
-Rv zroot/j/jails/admin-svn@sync.00
I've seen this before but never quite at such a bad time. Neither can be kill
-9'ed.
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