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Hello!

I came across this while trying to build 1.5A using the latest snapshot
1.4Y. This was while some heavy nfs-usage was happening (source directories
mounted via nfs)

Crash message and ddb trace attached

-- 
Jarkko Teppo
jate@uwasa.fi


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trap: bad kernel read access at 0x4a                                            
trap type 8, code = 0x505, v = 0x4a                                             
kernel program counter = 0xccbc8                                                
kernel: MMU fault trap                                                          
pid = 12289, pc = 000CCBC8, ps = 2004, sfc = 1, dfc = 1                         
Registers:                                                                      
             0        1        2        3        4        5        6        7   
dreg: 00000000 00000002 00000000 00000006 00000132 00000000 0000001F 00000000   
areg: 01C48900 0012F8BC 00046180 01C48900 00722E74 00000000 00722E1C FFEFF3A4
                                                                                
Kernel stack (00722D04):                                                        
722D04: 0011B49A 00722D54 00000080 00000000 00000006 00000132 00000000 0000001F 
722D24: 00000000 00046180 01C48900 00722E74 00000000 00000000 00000000 00722E1C 
722D44: 0000191A 00000008 00000505 0000004A 00000000 00000002 00000000 00000006 
722D64: 00000132 00000000 0000001F 00000000 01C48900 0012F8BC 00046180 01C48900 
722D84: 00722E74 00000000 00722E1C FFEFF3A4 00000000 2004000C CBC87008 00722DF8 
722DA4: 05050005 00050005 0000004A 00722DD4 00000000 006982D4 01C2DC00 000456B0 
722DC4: 005BA99C 00045894 0004590E 00000000 00000000 00000006 00000132 00000000 
722DE4: 0000001F 0408640A 00046180 01C48900 00722E74 006982D4 00000000 00722E24 
722E04: 00046240 00722E18 00000000 00046180 01C48900 0012FEA8 00722E38 000CCBB2 
722E24: 00000000 01C4890C 00000000 00000000 00000000 00722E60 000A6E7E 01C48900 
722E44: 005BA99C 005BA9EE 00718BF8 006D3484 006D3484 00722E80 000C517A 00722E80 
722E64: 00046140 00722E74 005BA99C 005B24B0 0012FEA8 005BA99C 00718BF8 00722EA8 
722E84: 0004CB48 005BA99C 00000001 005B24B0 0012FAC8 005BA99C 00000002 01C3E700 
722EA4: 00718BF8 00722EC0 0004D540 005BA99C 00000002 01C3E700 00718BF8 00722F10 
722EC4: 0001C366 005B24B0 00718BF8 00718BF8 005B24B0 006D34CB 00000003 0000000C 
722EE4: 005BA99C 000081ED 0001E170 00000000 00722EEC 00000001 00000000 00004170 
panic: MMU fault                                                                
Stopped in ld at        _cpu_Debugger+0x6:      unlk    a6                      
db>trace                                                                       
_cpu_Debugger(2004,722d54,8,2dd00,722d40) + 6                                   
_panic(11b06c,0,6,132,0) + 52                                                   
_trap(8,505,4a) + 234                                                           
_nfs_removerpc(0,1c4890c,0,0,0) + 12                                            
_nfs_removeit(1c48900,5ba99c,5ba9ee,718bf8,6d3484) + 18                         
_nfs_inactive(722e74,5ba99c,5b24b0,12fea8,5ba99c) + ba                          
_vput(5ba99c,1,5b24b0,12fac8,5ba99c) + c2                                       
_vn_close(5ba99c,2,1c3e700,718bf8,722f10) + 5c                                  
_vn_closefile(5b24b0,718bf8) + 18                                               
_closef(5b24b0,718bf8,ffeff3a4,718bf8,4) + 1d4                                  
_fdrelease(718bf8,3,722fa8,11c006,718bf8) + 98                                  
_sys_close(718bf8,722f88,722f80) + 1c                                           
_syscall(6) + 118                                                               
_trap0() + e                                                                    
db>

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