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Date:      Tue, 23 Aug 2016 09:30:06 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 178473] gmultipath(8) needs to be smarter about errors
Message-ID:  <bug-178473-8-mQoDQsMoxE@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-178473-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-178473-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D178473

--- Comment #1 from Jan Bramkamp <crest@bultmann.eu> ---
ZFS won't see the I/O request fail because geom_multipath retries all paths
into eternity instead of reporting failure. This might trigger the ZFS dead=
man
timer an panic() the system if enough geom_multipath providers are affected.
The worst part is that rebooting a system with a defective disk behind
geom_multipath hangs during (re-)boot and won't even reach single user mode
until geom_multipath is unloaded or the defective device is removed.

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