New submission from Joe "Floid" Kanowitz <[email protected]>:

Using 2.4.1 with the lone patch from http://bugs.dragonflybsd.org/issue1583

DragonFly tucker 2.4.1-RELEASE DragonFly v2.4.1.40.ga038d-RELEASE #1: Sat Jan 30
11:57:51 EST 2010     r...@tucker:/usr/obj/usr/src/sys/GENERIC  i386

... I'm not sure when this occurred; possibly during nightly cleanup.
The previous evening gave HAMMER a little more stress than usual via a bit of
`undo` usage (normally none) which did seem to be turning up transient(?)
"ITERATE ENTIRE HISTORY: Unknown error: 0" results similar to
http://leaf.dragonflybsd.org/mailarchive/users/2009-09/msg00062.html (but here
the HAMMER config is left at the sane defaults).  Not intending to poke at them
too much unless it relates to the panic here.

Couldn't get a dump because I didn't realize I hadn't specified a dumpdev 
(doh!).

db> trace                                                                       
Debugger(c0591d40) at Debugger+0x34                                             
panic(c0576343,c059e4c3,c055d984,11,4000) at panic+0x9f                         
btree_search(d6df38e4,d6df3880,c0483897,d6df38e4,d6df38e4) at btree_search+0x14a
hammer_btree_lookup(d6df38e4) at hammer_btree_lookup+0xd9                       
hammer_btree_first(d6df38e4,c04ad0a7,19792,15,22) at hammer_btree_first+0xd     
hammer_ioc_rebalance(d6df3a74,d684cdd0,c294ed50,f4240,0) at hammer_ioc_rebalanca
hammer_ioctl(d684cdd0,c0c0680f,c294ed50,1,c28a6b28) at hammer_ioctl+0x726       
hammer_vop_ioctl(d6df3ad0,c06409c0,d2f80d50,d2f8dc50,0) at hammer_vop_ioctl+0x2f
vop_ioctl(d2f80d50,c2a12e28,c0c0680f,c294ed50,1) at vop_ioctl+0x3e              
vn_ioctl(cfe75b40,c0c0680f,c294ed50,c28a6b28,d6df3cf0) at vn_ioctl+0xe0         
mapped_ioctl(4,c0c0680f,bfbff88c,0,d6df3cf0) at mapped_ioctl+0x3e7              
sys_ioctl(d6df3cf0,6,0,0,d268c6d8) at sys_ioctl+0x17                            
syscall2(d6df3d40) at syscall2+0x1ef                                            
Xint0x80_syscall() at Xint0x80_syscall+0x36                                     



Task map 0xc0514cec: pmap=0x1e2, nentries=1946206313, version=12061300          
                                                                                
                                                                                
Fatal trap 12: page fault while in kernel mode                                  
fault virtual address   = 0x8300c08a                                            
fault code              = supervisor read, page not present                     
instruction pointer     = 0x8:0xc04a5608                                        
stack pointer           = 0x10:0xd6df359c                                       
frame pointer           = 0x10:0xd6df35a8                                       
code segment            = base 0x0, limit 0xfffff, type 0x1b                    
                        = DPL 0, pres 1, def32 1, gran 1                        
processor eflags        = interrupt enabled, resume, IOPL = 0                   
current process         = 19689 (hammer)                                        
current thread          = pri 42 (CRIT)                                         
                                                                                
kernel: type 12 trap, code=0                                                    
Stopped at      Debugger+0x34:  movb    $0,in_Debugger.4260

----------
messages: 8140
nosy: floid
status: unread
title: panic (trap 12) around btree_search() in 2.4.1-RELEASE

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