[Bug 258208] [zfs] locks up when using rollback or destroy on both 13.0-RELEASE & sysutils/openzfs port

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 02 Sep 2021 10:15:13 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258208

--- Comment #1 from Dave Cottlehuber <dch@freebsd.org> ---
## zfs-kmod-v2021073000-zfs_7eebcd2be

sudo zfs destroy -vrRf 'embiggen/koans'
will destroy
embiggen/koans/cache/koan-ci/6253a9f1f8df5d292b0c675fafde7351c89d4e76587b8de7d7b76e699acdccf6
load: 0.29  cmd: sudo 95533 [select] 1104.21r 0.00u 0.01s 0% 8120k
mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_wait_sig+0x9 _cv_wait_sig+0xe4
seltdwait+0xa9 kern_poll+0x51b sys_ppoll+0x6f amd64_syscall+0x10c
fast_syscall_common+0xf8 
^C
load: 0.44  cmd: sudo 95533 [select] 2002.06r 0.00u 0.01s 0% 8120k
mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_wait_sig+0x9 _cv_wait_sig+0xe4
seltdwait+0xa9 kern_poll+0x51b sys_ppoll+0x6f amd64_syscall+0x10c
fast_syscall_common+0xf8 
load: 0.48  cmd: sudo 95533 [select] 3931.90r 0.00u 0.01s 0% 8120k
mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_wait_sig+0x9 _cv_wait_sig+0xe4
seltdwait+0xa9 kern_poll+0x51b sys_ppoll+0x6f amd64_syscall+0x10c
fast_syscall_common+0xf8 

## subsequent commands hang
# bectl list
^C
load: 0.46  cmd: bectl 97606 [zfs teardown] 1221.12r 0.00u 0.01s 0% 8056k
mi_switch+0xc1 _sleep+0x1cb rms_rlock_fallback+0x90 zfs_statfs+0x32
kern_getfsstat+0x202 sys_getfsstat+0x22 amd64_syscall+0x10c
fast_syscall_common+0xf8 
```

## zpool events -vf

From last "sync event" prior to the hanging destroy

```

Sep  2 2021 08:39:43.644450230 sysevent.fs.zfs.config_sync
        version = 0x0
        class = "sysevent.fs.zfs.config_sync"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        time = 0x61308dcf 0x266987b6 
        eid = 0x9

Sep  2 2021 08:42:38.680064715 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/0e6074eb51ffe7c5d478cb154327221d0355248e/%rollback"
        history_internal_str =
"parent=0e6074eb51ffe7c5d478cb154327221d0355248e"
        history_internal_name = "clone swap"
        history_dsid = 0x1ea
        history_txg = 0x1019819
        history_time = 0x61308e7e
        time = 0x61308e7e 0x2888f6cb 
        eid = 0xa

Sep  2 2021 08:42:38.698068059 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/0e6074eb51ffe7c5d478cb154327221d0355248e/%rollback"
        history_internal_str = "(bptree, mintxg=16881555)"
        history_internal_name = "destroy"
        history_dsid = 0x1ea
        history_txg = 0x1019819
        history_time = 0x61308e7e
        time = 0x61308e7e 0x299bac5b 
        eid = 0xb

Sep  2 2021 08:42:39.009063859 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/0e6074eb51ffe7c5d478cb154327221d0355248e/%rollback"
        history_internal_str =
"parent=0e6074eb51ffe7c5d478cb154327221d0355248e"
        history_internal_name = "clone swap"
        history_dsid = 0x1f8
        history_txg = 0x101981e
        history_time = 0x61308e7f
        time = 0x61308e7f 0x8a4db3 
        eid = 0xc

Sep  2 2021 08:42:39.011064352 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/0e6074eb51ffe7c5d478cb154327221d0355248e/%rollback"
        history_internal_str = "(bptree, mintxg=16881555)"
        history_internal_name = "destroy"
        history_dsid = 0x1f8
        history_txg = 0x101981e
        history_time = 0x61308e7f
        time = 0x61308e7f 0xa8d420 
        eid = 0xd

Sep  2 2021 08:42:41.355063329 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/cache/h2o/338ff637ff357ba38882e44d01251c511523ab67f2be5827b25d9de423544eb3@c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8"
        history_internal_str = " "
        history_internal_name = "snapshot"
        history_dsid = 0x3b4
        history_txg = 0x101981f
        history_time = 0x61308e81
        time = 0x61308e81 0x1529d621 
        eid = 0xe

Sep  2 2021 08:42:41.496063945 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8"
        history_internal_str =
"origin=embiggen/koans/templates/12.2-RELEASE@pristine (35650)"
        history_internal_name = "clone"
        history_dsid = 0x1ea
        history_txg = 0x1019820
        history_time = 0x61308e81
        time = 0x61308e81 0x1d9155c9 
        eid = 0xf

Sep  2 2021 08:42:41.648063789 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8@pristine"
        history_internal_str = " "
        history_internal_name = "snapshot"
        history_dsid = 0x328
        history_txg = 0x1019821
        history_time = 0x61308e81
        time = 0x61308e81 0x26a0ab2d 
        eid = 0x10

Sep  2 2021 08:42:41.923063860 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str =
"parent=c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8"
        history_internal_name = "clone swap"
        history_dsid = 0x27d
        history_txg = 0x1019826
        history_time = 0x61308e81
        time = 0x61308e81 0x3704d634 
        eid = 0x11

Sep  2 2021 08:42:41.926063583 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str = "(bptree, mintxg=16881697)"
        history_internal_name = "destroy"
        history_dsid = 0x27d
        history_txg = 0x1019826
        history_time = 0x61308e81
        time = 0x61308e81 0x37329bdf 
        eid = 0x12

Sep  2 2021 08:42:44.748063744 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str =
"parent=c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8"
        history_internal_name = "clone swap"
        history_dsid = 0x3bb
        history_txg = 0x101982b
        history_time = 0x61308e84
        time = 0x61308e84 0x2c968c00 
        eid = 0x13

Sep  2 2021 08:42:44.751063792 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str = "(bptree, mintxg=16881697)"
        history_internal_name = "destroy"
        history_dsid = 0x3bb
        history_txg = 0x101982b
        history_time = 0x61308e84
        time = 0x61308e84 0x2cc452f0 
        eid = 0x14

Sep  2 2021 08:42:44.968063430 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str =
"parent=c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8"
        history_internal_name = "clone swap"
        history_dsid = 0x71
        history_txg = 0x1019830
        history_time = 0x61308e84
        time = 0x61308e84 0x39b379c6 
        eid = 0x15

Sep  2 2021 08:42:44.970063949 sysevent.fs.zfs.history_event
        version = 0x0
        class = "sysevent.fs.zfs.history_event"
        pool = "embiggen"
        pool_guid = 0xb2c159b5522179d6
        pool_state = 0x0
        pool_context = 0x0
        history_hostname = "wintermute.skunkwerks.at"
        history_dsname =
"embiggen/koans/clones/h2o/c7ee4afccbd2d1c3dfb3310d5afbbd7b4df26bf8/%rollback"
        history_internal_str = "(bptree, mintxg=16881697)"
        history_internal_name = "destroy"
        history_dsid = 0x71
        history_txg = 0x1019830
        history_time = 0x61308e84
        time = 0x61308e84 0x39d2004d 
        eid = 0x16
```

and then nothing for 30 minutes.

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