This bug was fixed in the package zfs-linux - 0.7.5-1ubuntu16.6
---------------
zfs-linux (0.7.5-1ubuntu16.6) bionic; urgency=medium
* Fix hung z_zvol tasks during 'zfs receive' (LP: #1772412)
- Adds a dedicated, per-pool, prefetch taskq to prevent the traverse
code from monopolizing the global (and limited) system_taskq by
inappropriately scheduling long running tasks on it. This fixes
z_zvol hung tasks.
zfs-linux (0.7.5-1ubuntu16.5) bionic; urgency=medium
* Fix build error with tracepoints enabled (LP: #1828763)
- In b49151d684f44 (bionic kernel master-next branch) tx_waited has been
renamed to tx_dirty_delayed, but only in the tracepoint definition (in
trace_dmu.h) and not in the rest of the code, causing build errors if
zfs tracepoints are enabled; fix by reverting tx_dirty_delayed back to
the original name tx_waited.
-- Colin Ian King <[email protected]> Wed, 29 May 2019 17:24:22
+0100
** Changed in: zfs-linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1772412
Title:
zfs 0.7.9 fixes a bug (https://github.com/zfsonlinux/zfs/pull/7343)
that hangs the system completely
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