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Date:      Thu, 14 Apr 2016 12:15:14 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-threads@FreeBSD.org
Subject:   [Bug 204426] Processes terminating cannot access memory
Message-ID:  <bug-204426-16-YlQO2NU57K@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-204426-16@https.bugs.freebsd.org/bugzilla/>
References:  <bug-204426-16@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D204426

--- Comment #90 from Robert Blayzor <rblayzor@inoc.net> ---
In 12 days of running since the last debug patch, I've seen only the below =
on a
couple of the VM's....


lock order reversal:
 1st 0xfffff80009e5c418 ufs (ufs) @
/.amd_mnt/juno/pub/FreeBSD/10-STABLE/sys/kern/vfs_subr.c:2253
 2nd 0xfffffe007c5c37f8 bufwait (bufwait) @
/.amd_mnt/juno/pub/FreeBSD/10-STABLE/sys/ufs/ffs/ffs_vnops.c:262
 3rd 0xfffff80064499418 ufs (ufs) @
/.amd_mnt/juno/pub/FreeBSD/10-STABLE/sys/kern/vfs_subr.c:2253
KDB: stack backtrace:
#0 0xffffffff80484260 at kdb_backtrace+0x60
#1 0xffffffff804a30d4 at witness_checkorder+0xe24
#2 0xffffffff8042b98a at __lockmgr_args+0x9ea
#3 0xffffffff806818f4 at ffs_lock+0x84
#4 0xffffffff8073dc2c at VOP_LOCK1_APV+0xfc
#5 0xffffffff805057da at _vn_lock+0xaa
#6 0xffffffff804f6de7 at vget+0x67
#7 0xffffffff804ea601 at vfs_hash_get+0xe1
#8 0xffffffff8067cf00 at ffs_vgetf+0x40
#9 0xffffffff80674bf0 at softdep_sync_buf+0xac0
#10 0xffffffff80682656 at ffs_syncvnode+0x286
#11 0xffffffff80659a5e at ffs_truncate+0x6ae
#12 0xffffffff8068987a at ufs_direnter+0x81a
#13 0xffffffff806926a5 at ufs_makeinode+0x575
#14 0xffffffff8068e58d at ufs_create+0x2d
#15 0xffffffff8073b5c1 at VOP_CREATE_APV+0xf1
#16 0xffffffff80504e93 at vn_open_cred+0x2c3
#17 0xffffffff804fdf8f at kern_openat+0x26f

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