ufs LOR

[Maksim Yevmenkin]

Hello,

after upgrading to recent -current

beetle% uname -a
FreeBSD beetle.digisle.com 6.0-CURRENT FreeBSD 6.0-CURRENT #3: Fri Jun 
17 10:57:03 PDT 2005 max at beetle.digisle.com:/usr/obj/usr/src/sys/GENERIC 
i386

i'm getting the following LOR (see below). the easiest way to reproduce 
it (for me) is to run 'make buildworld/buildkernel'. my 
/var/log/messages flooded with the same traces while make is running.

would person who is responsible for this please fix it or please back it 
out.

Jun 20 10:36:41 beetle kernel: --- syscall (121, FreeBSD ELF32, writev), 
eip = 0x280c8d5b, esp = 0xbfbfce8c, ebp = 0xbfbfd598 ---
Jun 20 10:36:41 beetle kernel: Acquiring lockmgr lock "ufs" with the 
following non-sleepable locks held:
Jun 20 10:36:41 beetle kernel: exclusive sleep mutex vnode pollinfo r = 
0 (0xc62b8000) locked @ /usr/src/sys/kern/kern_event.c:1224
Jun 20 10:36:41 beetle kernel: KDB: stack backtrace:
Jun 20 10:36:41 beetle kernel: 
kdb_backtrace(1,3001,c2c8bb1c,c2b40600,e73d5a3c) at kdb_backtrace+0x29
Jun 20 10:36:41 beetle kernel: 
witness_warn(5,c091682c,c084cf18,c0855b4c) at witness_warn+0x18e
Jun 20 10:36:41 beetle kernel: 
lockmgr(c2c8baf8,3001,c2c8bb1c,c2b40600,e73d5a68) at lockmgr+0x8d
Jun 20 10:36:41 beetle kernel: 
vop_stdlock(e73d5aac,c08ecae0,e73d5aac,e73d5a78,c076a18c) at 
vop_stdlock+0x1e
Jun 20 10:36:41 beetle kernel: 
VOP_LOCK_APV(c08ed020,e73d5aac,e73d5a8c,c07f7fe3,e73d5aac) at 
VOP_LOCK_APV+0x87
Jun 20 10:36:41 beetle kernel: 
ffs_lock(e73d5aac,1001,c2c8baa0,e73d5ac8,c068bc90) at ffs_lock+0x10
Jun 20 10:36:41 beetle kernel: VOP_LOCK_APV(c08ecae0,e73d5aac) at 
VOP_LOCK_APV+0x87
Jun 20 10:36:41 beetle kernel: vn_lock(c2c8baa0,1001,c2b40600) at 
vn_lock+0xa8
Jun 20 10:36:41 beetle kernel: filt_vfsread(c297de58,0) at filt_vfsread+0x3a
Jun 20 10:36:41 beetle kernel: 
kqueue_scan(c5d34180,1,e73d5cc8,0,e73d5bf4) at kqueue_scan+0x463
Jun 20 10:36:41 beetle kernel: kern_kevent(c2b40600,4,0,1,e73d5cc8) at 
kern_kevent+0x151
Jun 20 10:36:41 beetle kernel: kevent(c2b40600,e73d5d04,6,1a4,246) at 
kevent+0x55
Jun 20 10:36:41 beetle kernel: syscall(3b,3b,3b,1,804e068) at syscall+0x22f
Jun 20 10:36:41 beetle kernel: Xint0x80_syscall() at Xint0x80_syscall+0x1f