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From: Scott Bennett <bennett@sdf.org>
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Date: Sun, 05 Feb 2017 07:41:16 -0600
To: xenophon@irtnog.org
Subject: Swapping from a zvol results in a deadman panic
Cc: freebsd-stable@freebsd.org
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On Sat, 4 Feb 2017 08:18:28 -0500 "Matthew X. Economou" <xenophon@irtnog.org>
wrote:

>My FreeBSD 10.3-RELEASE-p16 server crashes in the middle of a Poudriere
>bulk run (see below).  This crash happens even if I lower
>vfs.zfs.arc_max or tweak vm.v_free_min/target/reserved/severe.  I'm
>looking for configuration advice in case I missed something obvious,
>since this seems to work on Illumos- and Linux-derived O/Ses, but
>failing that, I'd like to get some advice as to how to go about
>debugging this.  I doubt the deadman timer causes the system to stop
>responding.  It's more likely a race condition elsewhere.
>
     Those who try to create deadlocks should not complain when they succeed.
Sigh.


                                  Scott Bennett, Comm. ASMELG, CFIAG
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