mirror_zfs

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Kyle Evans 421750672b module: freebsd: avoid a taking a destroyed lock in zfs_zevent bits

At shutdown time, we drain all of the zevents and set the
ZEVENT_SHUTDOWN flag.  On FreeBSD, we may end up calling
zfs_zevent_destroy() after the zevent_lock has been destroyed while
the sysevent thread is winding down; we observe ESHUTDOWN, then back
out.

Events have already been drained, so just inline the kmem_free call in
sysevent_worker() to avoid the race, and document the assumption that
zfs_zevent_destroy doesn't do anything else useful at that point.

This fixes a panic that can occur at module unload time.

Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Closes #13220

2022-03-18 17:11:43 -07:00

avl

Fix various typos

2021-04-07 13:27:11 -07:00

icp

Use fallthrough macro

2021-11-02 09:50:30 -07:00

lua

Use fallthrough macro

2021-11-02 09:50:30 -07:00

nvpair

Update checkstyle workflow env to ubuntu-20.04