More unionfs madness

Dario Freni saturnero at freesbie.org
Mon Aug 1 16:17:49 GMT 2005


Background:
- Read-only compressed partition mounted on /var
- Memory fs created on /mnt/union/var (using mount_md function of rc.subr)
- Created the directory structure on the memory fs
- mount_unionfs -o noatime /mnt/union/var /var (noatime is a suggested
workaround for a bug I've already found, see fs@ archive)

I'm getting panic during the init phase, when newsyslog script is called:

Creating and/or trimming log files:panic: lockmgr: locking against myself
cpuid = 0
KDB: enter: panic
[thread pid 231 tid 100051 ]
Stopped at      kdb_enter+0x2b: nop
db> tr
Tracing pid 231 tid 100051 td 0xc1470480
kdb_enter(c08a550b) at kdb_enter+0x2b
panic(c08a397e,c1470480,0,c0913fa0,c840a990) at panic+0x127
lockmgr(c1917058,2002,c191707c,c1470480,c840a970) at lockmgr+0x3da
vop_stdlock(c840a990,2,c1917000,c840a9ac,c06cb648) at vop_stdlock+0x1e
VOP_LOCK_APV(c0905ae0,c840a990) at VOP_LOCK_APV+0x87
vn_lock(c1917000,2,c1470480,0,13) at vn_lock+0xa8
union_allocvp(c840ac2c,c1455800,c1878550,c17f2990,c840ac40) at
union_allocvp+0x25b
union_lookup(c840ab38,c1878550,0,c840ab54,c06ba68a) at union_lookup+0x627
VOP_LOOKUP_APV(c0905ae0,c840ab38) at VOP_LOOKUP_APV+0x87
lookup(c840ac18,c1458044,0,c1470480,12b) at lookup+0x3d6
namei(c840ac18,1,0,c09861e8,c0985b30) at namei+0x35a
kern_rename(c1470480,bfbfb730,8051100,0,c840ad30) at kern_rename+0xf4
rename(c1470480,c840ad04,2,1c,80296) at rename+0x15
syscall(3b,3b,3b,3,bfbfb730) at syscall+0x22f
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (128, FreeBSD ELF32, rename), eip = 0x280bbd47, esp =
0xbfbfb70c, ebp = 0xbfbfbba8 ---
db>

In know that unionfs is totally broken atm, but when will this be fixed?
 The unusability of unionfs is a step back for my project.

Bye,
Dario

-- 
Dario Freni (saturnero at freesbie.org)
FreeSBIE developer (http://www.freesbie.org)
GPG Public key at http://www.saturnero.net/saturnero.asc



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