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Date:      Fri, 9 Dec 2016 18:13:32 +0500
From:      "Eugene M. Zheganin" <emz@norma.perm.ru>
To:        freebsd-stable@freebsd.org
Subject:   vfs.zfs.vdev.bio_delete_disable - crash while changing on the fly
Message-ID:  <584AADFC.8090700@norma.perm.ru>

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Hi.

Recently I've encountered the issue with "slow TRIM" and Sandisk SSDs,
so I was told  to try to disable TRIM and see what happens (thanks a lot
by the way, that did it). But changing the
vfs.zfs.vdev.bio_delete_disable on the fly can lead to the system crash
with the probability of 50%. Is it just me or is this already known ? If
it's known, why isn't this oid in a read-only list ?

Thanks.

P.S. My box tried to dump a core, but after a reboot savecore got
nothing, so you just have to believe me. ;)

Eugene.



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