Date: Mon, 13 Jul 2009 17:28:05 -0400 From: Glen Barber <glen.j.barber@gmail.com> To: =?ISO-8859-1?Q?Fernando_Apestegu=EDa?= <fernando.apesteguia@gmail.com> Cc: User Questions <freebsd-questions@freebsd.org> Subject: Re: 8.0 BETA1 LOR Message-ID: <4ad871310907131428v533d5187p17fd6536224bcd21@mail.gmail.com> In-Reply-To: <1bd550a00907131347j118904b8j4dbc06b538283ae@mail.gmail.com> References: <1bd550a00907131347j118904b8j4dbc06b538283ae@mail.gmail.com>
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Hi, Fernando 2009/7/13 Fernando Apestegu=EDa <fernando.apesteguia@gmail.com>: > Hi there, > > I downloaded FreeBSD 8.0 in order to help testing it. I have found > several issues. This is the first one: > > Jul 13 18:37:43 beastie kernel: lock order reversal: > Jul 13 18:37:43 beastie kernel: 1st 0xffffff0007d42ba8 ufs (ufs) @ > /usr/src/sys/kern/vfs_mount.c:1199 > Jul 13 18:37:43 beastie kernel: 2nd 0xffffff002e007270 devfs (devfs) @ > /usr/src/sys/fs/msdosfs/msdosfs_vfsops.c:944 > Jul 13 18:37:43 beastie kernel: KDB: stack backtrace: > Jul 13 18:37:43 beastie kernel: db_trace_self_wrapper() at > db_trace_self_wrapper+0x2a > Jul 13 18:37:43 beastie kernel: _witness_debugger() at _witness_debugger+= 0x2e > Jul 13 18:37:43 beastie kernel: witness_checkorder() at witness_checkorde= r+0x81e > Jul 13 18:37:43 beastie kernel: __lockmgr_args() at __lockmgr_args+0xcf3 > Jul 13 18:37:43 beastie kernel: vop_stdlock() at vop_stdlock+0x39 > Jul 13 18:37:43 beastie kernel: VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b > Jul 13 18:37:43 beastie kernel: _vn_lock() at _vn_lock+0x47 > Jul 13 18:37:43 beastie kernel: msdosfs_sync() at msdosfs_sync+0x227 > Jul 13 18:37:43 beastie kernel: dounmount() at dounmount+0x2ca > Jul 13 18:37:43 beastie kernel: unmount() at unmount+0x28a > Jul 13 18:37:43 beastie kernel: syscall() at syscall+0x1af > Jul 13 18:37:43 beastie kernel: Xfast_syscall() at Xfast_syscall+0xd0 > Jul 13 18:37:43 beastie kernel: --- syscall (22, FreeBSD ELF64, > unmount), rip =3D 0x8006a09ac, rsp =3D 0x7fffffffdc38, rbp =3D 0 --- > Jul 13 18:37:44 beastie gnome-keyring-daemon[61245]: removing > removable location: volume_size_4144496640 > > I got this while trying to unmount a USB device. The unmounting seemed > to be fine, all the files were in the device and no corruption > occurred. I found a very similar problem (maybe the same) here[1]. Any > clues about this? > > > Thanks in advance. > > PS: Is this the proper list for asking these questions? > > [1] http://forums.freebsd.org/showthread.php?p=3D31490 You can view reported lock order reversals here: http://sources.zabbadoz.net/freebsd/lor.html Questions about the -CURRENT branch should be asked on questions@. --=20 Glen Barber
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