Date: Tue, 14 Jul 2009 11:55:24 +0200 From: =?ISO-8859-1?Q?Fernando_Apestegu=EDa?= <fernando.apesteguia@gmail.com> To: Glen Barber <glen.j.barber@gmail.com> Cc: User Questions <freebsd-questions@freebsd.org> Subject: Re: 8.0 BETA1 LOR Message-ID: <1bd550a00907140255g427e0e65s3e7727899b62406d@mail.gmail.com> In-Reply-To: <4ad871310907131437p439bc099o243f578e9c6740e6@mail.gmail.com> References: <1bd550a00907131347j118904b8j4dbc06b538283ae@mail.gmail.com> <4ad871310907131428v533d5187p17fd6536224bcd21@mail.gmail.com> <4ad871310907131437p439bc099o243f578e9c6740e6@mail.gmail.com>
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2009/7/13 Glen Barber <glen.j.barber@gmail.com>: > 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_debugge= r+0x2e >>> Jul 13 18:37:43 beastie kernel: witness_checkorder() at witness_checkor= der+0x81e >>> Jul 13 18:37:43 beastie kernel: __lockmgr_args() at __lockmgr_args+0xcf= 3 >>> 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. =A0I meant curren= t@. OK, thanks. I will have a look at the list. Cheers > > Sorry for the noise. > > > -- > Glen Barber >
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