[Bug 267533] Zfs Multi-Modifier Protection trigger an activity check even if it is disabled

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 03 Nov 2022 15:40:44 UTC

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
                 CC|                            |markj@FreeBSD.org
             Status|New                         |Open

--- Comment #1 from Mark Johnston <markj@FreeBSD.org> ---
I'm not very familiar with this feature, so this might be a stupid question.

> multihost activity detected txg 3144 ub_txg  3145 timestamp 1666367872 ub_timestamp  1666367903

Doesn't this indicate that something is indeed writing to the pool?  In
spa_activity_check() we are polling the root vdev's uberblocks to see if
anything is writing to the pool, and the txg changes while polling.  Even if
the pool has multihost=off and no MMP config, I would expect the txg to stay

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