panic: _mtx_lock_sleep: recursed on non-recursive mutex UMA lock _at_ uma_core.c:849

FreeBSD 5.2-CURRENT #1: Wed Jun 23 13:14:36 CEST 2004

puid = 0;
Debugger("panic")
Stopped at      Debugger+0x55:  xchgl   %ebx,in_Debugger.0
db> show pcpu
cpuid        = 0
curthread    = 0xc1629160: pid 9 "pagedaemon"
curpcb       = 0xd0792da0
fpcurthread  = none
idlethread   = 0xc14f9580: pid 11 "idle: cpu0"
APIC ID      = 0
currentldt   = 0x28
spin locks held:
db> t
Debugger(c0889ea6,0,c088934d,d0792a38,100) at Debugger+0x55
panic(c088934d,c08a2f87,c08a2d93,351,c0987600) at panic+0x156
_mtx_lock_sleep(c0987600,0,c08a2d93,351,c10453c0) at _mtx_lock_sleep+0xbf
_mtx_lock_flags(c0987600,0,c08a2d93,351,101) at _mtx_lock_flags+0xb2
startup_alloc(c10446e0,1000,d0792abb,101,c0678936) at startup_alloc+0x3c
slab_zalloc(c10446e0,1,8,c08a2d9c,78e) at slab_zalloc+0xa9
uma_zone_slab(c10446e0,1,c08a2d93,78e,0) at uma_zone_slab+0xea
uma_zalloc_internal(c10446e0,0,1,0,c1021c98) at uma_zalloc_internal+0x41
bucket_alloc(33,1,c08a2d93,818,1) at bucket_alloc+0x65
uma_zfree_arg(c1021c60,c21c2000,0,0,d0792ba4) at uma_zfree_arg+0x2b6
mb_fini_pack(c1aa7100,100,c08a2d93,88c,7000246) at mb_fini_pack+0x28
uma_zfree_internal(c1021dc0,c1aa7100,0,1,0) at uma_zfree_internal+0x56
bucket_drain(c1021dc0,c21aa830,c08a2d93,277,c1021dc0) at bucket_drain+0xfe
bucket_cache_drain(c1021dc0,0,c08a2d93,2a3,c064791a) at bucket_cache_drain+0x63
zone_drain(c1021dc0,0,c08a2d93,55f,0) at zone_drain+0x58
zone_foreach(c07dc090,d0792cf0,c07d9838,c14f658c,0) at zone_foreach+0x55
uma_reclaim(c14f658c,0,c08a2b93,2a4,c0954600) at uma_reclaim+0x17
vm_pageout_scan(0,0,c08a2b93,5b4,1f4) at vm_pageout_scan+0x148
vm_pageout(0,d0792d48,c0887662,328,0) at vm_pageout+0x31b
fork_exit(c07da610,0,d0792d48) at fork_exit+0xc2
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd0792d7c, ebp = 0 ---

More info _at_ http://www.holm.cc/stress/log/cons53.html
-- 
Peter Holm