6.0-BETA2: LOR in UMA subsytem

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Hi,

for a fresh installed 6.0-BETA2 i get this LOR. Actually there is a make 
buildworld running.
System is P3-800MHz SMP. dmesg output is attached. The two 
taskqueue_drain's which are in the dmesg output are already mailed 
seperately.

lock order reversal
  1st 0xc097b240 UMA lock (UMA lock) _at_ /usr/src/sys/vm/uma_core.c:1494
  2nd 0xc1060144 system map (system map) _at_ /usr/src/sys/vm/vm_map.c:2317
KDB: stack backtrace:
kdb_backtrace(0,ffffffff,c0930358,c0930498,c08bace4) at kdb_backtrace+0x29
witness_checkorder(c1060144,9,c08714b6,90d) at witness_checkorder+0x564
_mtx_lock_flags(c1060144,0,c08714b6,90d) at _mtx_lock_flags+0x5b
_vm_map_lock(c10600c0,c08714b6,90d) at _vm_map_lock+0x26
vm_map_remove(c10600c0,c1ebd000,c1ebe000,d5702c08,c077ee01) at vm_map_remove+0x1f
kmem_free(c10600c0,c1ebd000,1000,d5702c38,c077e7ae) at kmem_free+0x25
page_free(c1ebd000,1000,2) at page_free+0x29
zone_drain(c1cb95a0) at zone_drain+0x26a
zone_foreach(c077e544,d5702cec,c079062f,c1ae4300,d5702c74) at zone_foreach+0x37
uma_reclaim(c1ae4300,d5702c74,0,c0926980,d5702c80) at uma_reclaim+0x12
vm_pageout_scan(0,c097b6a0,0,c08729a3,5c3) at vm_pageout_scan+0x103
vm_pageout(0,d5702d38,0,c07913e8,0) at vm_pageout+0x2c3
fork_exit(c07913e8,0,d5702d38) at fork_exit+0xa0
fork_trampoline() at fork_trampoline+0x8
- --- trap 0x1, eip = 0, esp = 0xd5702d6c, ebp = 0 ---

regards
Joerg

- -- 
The beginning is the most important part of the work.
 				-Plato
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