Date: Mon, 13 Jul 2009 17:37:39 -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: <4ad871310907131437p439bc099o243f578e9c6740e6@mail.gmail.com> In-Reply-To: <4ad871310907131428v533d5187p17fd6536224bcd21@mail.gmail.com> References: <1bd550a00907131347j118904b8j4dbc06b538283ae@mail.gmail.com> <4ad871310907131428v533d5187p17fd6536224bcd21@mail.gmail.com>
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2009/7/13 Glen Barber <glen.j.barber@gmail.com>: > 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_checkord= er+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@. > This is why multitasking is not generally a good thing. I meant current@. Sorry for the noise. --=20 Glen Barber
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