[Bug 275308] EN tracking issue for potential ZFS data corruption

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 25 Nov 2023 09:37:00 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308

Rob Norris <robn@despairlabs.com> changed:

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                 CC|                            |robn@despairlabs.com

--- Comment #8 from Rob Norris <robn@despairlabs.com> ---
Hi, I'm the author of 15571. Just a couple of notes:

- dmu_offset_next_sync=0 does appear to be a very reliable workaround, just not
technically perfect. Only one person has been able to trip it on an extremely
contrived test, as opposed to the default =1, which multiple people have been
able to reproduce consistently.

- The incorrect dirty check in 12.4 (as in Illumos) is in
dmu_object_wait_synced(). I have not explored this at all though; OpenZFS never
had this version and a lot has changed since. There may be other reasons why it
can't be tripped.

Let me know if there's anything I can assist with.

Rob.

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