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Date:      Thu, 03 Mar 2005 18:08:26 -0800
From:      Julian Elischer <julian@elischer.org>
To:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   FYI.. panic in yesterday's system
Message-ID:  <4227C31A.1000100@elischer.org>

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well maybe 40 hours old sources.. will resync and rebuild

FYI for statistical debuggging:
panic: Duplicate free of item 0xe0997594 from zone 0xc1063c60(KMAP ENTRY)

cpuid = 1
KDB: enter: panic
[thread pid 7033 tid 100154 ]
Stopped at      kdb_enter+0x2b: nop
db> tr
Tracing pid 7033 tid 100154 td 0xc2b645c0
kdb_enter(c0821f56) at kdb_enter+0x2b
panic(c083bbd7,e0997594,c1063c60,c083c298,c083bbbb) at panic+0x127
uma_dbg_free(c1063c60,0,e0997594) at uma_dbg_free+0x110
uma_zfree_arg(c1063c60,e0997594,0) at uma_zfree_arg+0xf3
vm_map_entry_dispose(c1059240,e0997594,c0966080,0,c0843ebc) at 
vm_map_entry_dispose+0x28
vm_map_entry_delete(c1059240,e0997594,0,c082ab5f,e0997594) at 
vm_map_entry_delete+0x13b
vm_map_delete(c1059240,d9914000,d991c000,d64230c0,e766baa4) at 
vm_map_delete+0x18f
bfreekva(d64230c0,c3904d38,1,0,0) at bfreekva+0x48
getnewbuf(0,0,800,4000,0) at getnewbuf+0x5be
getblk(c3904cc0,0,0,800,0) at getblk+0x3a7
breadn(c3904cc0,0,0,800,0) at breadn+0x31
bread(c3904cc0,0,0,800,0) at bread+0x20
ffs_read(e766bc18) at ffs_read+0x23b
VOP_READ_APV(c08bcc60,e766bc18) at VOP_READ_APV+0x7e
ufs_readdir(e766bca0) at ufs_readdir+0xd1
VOP_READDIR_APV(c08bcc60,e766bca0) at VOP_READDIR_APV+0x7e
getdirentries(c2b645c0,e766bd14,4,34,246) at getdirentries+0x13f
syscall(805002f,bfbf002f,bfbf002f,8053100,8059780) at syscall+0x213
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (196, FreeBSD ELF32, getdirentries), eip = 0x280bc323, esp = 
0xbfbfeafc, ebp = 0xbfbfeb28 ---


on 'panic' the system goes into an almost infinite loop:
panic: mi_switch: switch in a critical section
cpuid = 1
panic: mi_switch: switch in a critical section
cpuid = 1
panic: mi_switch: switch in a critical section
cpuid = 1
[...]
it eventually reboots however.




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