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Date:      Sat, 9 Jan 2010 08:59:16 +1100
From:      Peter Jeremy <peterjeremy@acm.org>
To:        freebsd-stable@freebsd.org
Cc:        bzeeb+freebsd+lor@zabbadoz.net
Subject:   New LOR: allproc/zfs
Message-ID:  <20100108215916.GD41129@server.vk2pj.dyndns.org>

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Just found a new LOR on 8-STABLE/amd64 from 30-Nov.  It's possible that
it was associated with 'vmstat -m'.  Reported as kern/142489

lock order reversal:
 1st 0xffffffff807417c0 allproc (allproc) @ /usr/src/sys/vm/vm_meter.c:130
 2nd 0xffffff002c263ba8 zfs (zfs) @ /usr/src/sys/kern/vfs_subr.c:2188
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2c
witness_checkorder() at witness_checkorder+0x66f
__lockmgr_args() at __lockmgr_args+0x475
vop_stdlock() at vop_stdlock+0x39
VOP_LOCK1_APV() at VOP_LOCK1_APV+0x52
_vn_lock() at _vn_lock+0x47
vrele() at vrele+0xc3
vm_object_deallocate() at vm_object_deallocate+0x1ad
_vm_map_unlock() at _vm_map_unlock+0x70
vm_map_remove() at vm_map_remove+0x6f
vmspace_free() at vmspace_free+0x56
vmtotal() at vmtotal+0x3d5
sysctl_root() at sysctl_root+0xa1
userland_sysctl() at userland_sysctl+0x158
__sysctl() at __sysctl+0xaa
syscall() at syscall+0x1ac
Xfast_syscall() at Xfast_syscall+0xe1
--- syscall (202, FreeBSD ELF64, __sysctl), rip =3D 0x800bc5a9c, rsp =3D 0x=
7fffffffdaf8, rbp =3D 0x7fffffffdb08 ---

--=20
Peter Jeremy

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