8.0 BETA1 LOR

Fernando Apesteguía fernando.apesteguia at gmail.com
Mon Jul 13 21:11:35 UTC 2009


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_checkorder+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 = 0x8006a09ac, rsp = 0x7fffffffdc38, rbp = 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=31490


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