[Bug 284437] zdb -y somepool fails

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284437

peter@wemm.org changed:

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                 CC|                            |peter@wemm.org

--- Comment #1 from peter@wemm.org ---
There has been a lot of confusion about this message.  What we know:

1) The command can detect corruption, but

2) the command has internal limits to avoid excessive memory consumption. 
These limits probably seemed reasonable at the time but they are easily reached
by a lot of people on perfectly healthy pools. Presumably the limits need to be
adjusted.

3) The #2 false positive is scaring the heck out of people for no good reason.

If you read the github bug https://github.com/openzfs/zfs/issues/15030 you'll
see that people have been recovering pools.  On linux they set
zil_replay_disable (via procfs) to mount the damaged pool and then and
zfs_recover (via procfs) and run a scrub.  We have equivalent sysctls.  YMMV of
course.

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