[Bug 229614] ZFS lockup in zil_commit_impl

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229614

--- Comment #26 from Andreas Sommer <andreas.sommer87 at googlemail.com> ---
I recommend everyone having the described problem and similar `procstat -kk`
stacktrace to patch their kernel manually for now. For our development CI host,
I did just that (built and replaced kernel only) and it works stably for some
days now *without* the `kern.maxvnodes=HIGHNUMBER` workaround. The same applies
to my reproduction setup (see GitHub link, posted above) – previously it took a
few seconds to reproduce the issue, and after replacing the kernel, no more
problems.

However, if you have 24/7 services that need to keep running, probably use the
workaround for now and wait for a dot release which will then anyhow require a
reboot.

2 months actually sounds long enough to give the safety of many people trying
and confirming the change. It will also immediately make it from head to
stable/12 according to https://www.freebsd.org/releases/12.0R/schedule.html, so
I'm happy.

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