Index: user/pho/stress2/misc/rename3.sh
===================================================================
--- user/pho/stress2/misc/rename3.sh	(revision 287621)
+++ user/pho/stress2/misc/rename3.sh	(revision 287622)
@@ -1,49 +1,53 @@
 #!/bin/sh
 
 #
 # Copyright (c) 2009 Peter Holm <pho@FreeBSD.org>
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 #
 
 # Test vulnerability to transient failures when a directory closer
 # to the root directory is renamed
 
+# Deadlocks seen:
+# https://people.freebsd.org/~pho/stress/log/kostik447.txt
+# https://people.freebsd.org/~pho/stress/log/kirk058.txt
+
 # Test scenario by Tor Egge
 
 root=/tmp
 for i in `jot 10000`; do
 	rm -rf ${root}/a
 	mkdir -p ${root}/a/b/c/d/e/f/g
 	mkdir -p ${root}/a/b/c/d/e/f/z
 	cd ${root}/a/b/c/d/e/f
 	( mv ${root}/a/b/c ${root}/a/c ) &
 	if ! mv z g/z; then
 		echo "FAILURE at loop $i"
 		break
 	fi
 	wait
 done
 rm -rf ${root}/a
Index: user/pho/stress2/misc/suj31.sh
===================================================================
--- user/pho/stress2/misc/suj31.sh	(revision 287621)
+++ user/pho/stress2/misc/suj31.sh	(revision 287622)
@@ -1,63 +1,66 @@
 #!/bin/sh
 
 #
 # Copyright (c) 2013 Peter Holm <pho@FreeBSD.org>
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD: projects/stress2/misc/suj.sh 210724 2010-08-01 10:33:03Z pho $
 #
 
 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
 
 # Run with marcus.cfg on a 2g swap backed MD
 # Scenario: Update old disk to SU+J
 
+# OOVM seen:
+# https://people.freebsd.org/~pho/stress/log/suj31.txt
+
 . ../default.cfg
 
 mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
 mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
 
 mdconfig -a -t swap -s 2g -u $mdstart || exit 1
 bsdlabel -w md$mdstart auto
 newfs -U md${mdstart}$part > /dev/null
 mount /dev/md${mdstart}$part $mntpoint
 chmod 777 $mntpoint
 
 export runRUNTIME=10m
 export RUNDIR=$mntpoint/stressX
 su $testuser -c 'cd ..; ./run.sh marcus.cfg' > /dev/null 2>&1
 while mount | grep $mntpoint | grep -q /dev/md; do
 	umount $mntpoint || sleep 1
 done
 
 tunefs -j enable /dev/md${mdstart}$part
 mount /dev/md${mdstart}$part $mntpoint
 chmod 777 $mntpoint
 su $testuser -c 'cd ..; ./run.sh marcus.cfg' > /dev/null 2>&1
 while mount | grep $mntpoint | grep -q /dev/md; do
 	umount $mntpoint || sleep 1
 done
 
 checkfs /dev/md${mdstart}$part
 mdconfig -d -u $mdstart
Index: user/pho/stress2/misc/trim6.sh
===================================================================
--- user/pho/stress2/misc/trim6.sh	(revision 287621)
+++ user/pho/stress2/misc/trim6.sh	(revision 287622)
@@ -1,56 +1,59 @@
 #!/bin/sh
 
 #
 # Copyright (c) 2015 EMC Corp.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 #
 
 # Test scenario for exhausting limited malloc KVA on 32bit machine, by
 # extending a file on a UFS SU volume.
 
 # Create a large file on a file system with trim enabled.
 # Watchdog timeout seen:
 # https://people.freebsd.org/~pho/stress/log/trim6.txt
 # Fixed by r287361.
 
+# "panic: negative mnt_ref" seen:
+# https://people.freebsd.org/~pho/stress/log/kostik835.txt
+
 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
 
 r=`mount | grep -w soft-updates | awk '{print $1}' | while read dev; do
 	dumpfs $dev | head -20 | grep -qw trim || continue
 	df -k $dev
 done |  sort -rn +3 | head -1 | awk '{print $4, $6}'`
 [ -z "$r" ] && exit	# No trim enabled file systems found
 set $r
 free=$(($1 / 1024 / 10 * 9))	# in Mb
 max=$((128 * 1024)) # Max is 128 GB
 [ $free -gt $max ] && free=$max
 mp=$2
 image=`echo $mp/diskimage | sed s#//#/#` # fix "//" for case mp = "/"
 trap "rm -f $image" EXIT SIGINT
 
 echo "dd if=/dev/zero of=$image bs=1m count=$free"
 dd if=/dev/zero of=$image bs=1m count=$free 2>&1 |
     egrep -v 'records|transferred'