kernel panic on Xserve G4 -CURRENT

[Ross Gohlke]

Sorry about that.

Here it is.

%dmesg
FreeBSD 8.0-CURRENT #0: Thu Nov 13 14:33:29 CST 2008
    root at rorty.grinz.com:/usr/obj/usr/src/sys/RORTY
WARNING: WITNESS option enabled, expect reduced performance.
cpu0: Motorola PowerPC 7455 revision 2.1, 1000.00 MHz
cpu0: HID0 8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>
real memory  = 2135265280 (2036 MB)
avail memory = 2067099648 (1971 MB)

...

lock order reversal:
 1st 0xc41048 user map (user map) @ /usr/src/sys/vm/vm_map.c:3115
 2nd 0xdfd7cc ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2047
KDB: stack backtrace:
0xe08cf930: at kdb_backtrace+0x4c
0xe08cf950: at _witness_debugger+0x3c
0xe08cf970: at witness_checkorder+0x8d0
0xe08cf9d0: at __lockmgr_args+0x23c
0xe08cfa50: at ffs_lock+0x9c
0xe08cfa80: at VOP_LOCK1_APV+0xec
0xe08cfaa0: at _vn_lock+0x84
0xe08cfaf0: at vget+0xdc
0xe08cfb30: at vnode_pager_lock+0x20c
0xe08cfb90: at vm_fault+0x218
0xe08cfca0: at trap_pfault+0x128
0xe08cfce0: at trap+0x1ac
0xe08cfda0: at powerpc_interrupt+0x15c
0xe08cfdd0: user ISI trap by 0x1818f4c: srr1=0x4000d032
            r1=0x7fffded0 cr=0x24000048 xer=0 ctr=0
lock order reversal:
 1st 0xd9d16df8 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2443
 2nd 0xe38800 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:263
KDB: stack backtrace:
0xe5077a20: at kdb_backtrace+0x4c
0xe5077a40: at _witness_debugger+0x3c
0xe5077a60: at witness_checkorder+0x8d0
0xe5077ac0: at _sx_xlock+0x90
0xe5077af0: at ufsdirhash_acquire+0x40
0xe5077b10: at ufsdirhash_remove+0x2c
0xe5077b40: at ufs_dirremove+0x100
0xe5077b80: at ufs_remove+0x8c
0xe5077bc0: at VOP_REMOVE_APV+0xe0
0xe5077be0: at kern_unlinkat+0x1b4
0xe5077ca0: at kern_unlink+0x24
0xe5077cc0: at unlink+0x1c
0xe5077ce0: at trap+0x460
0xe5077da0: at powerpc_interrupt+0x15c
0xe5077dd0: user SC trap by 0x21940198: srr1=0xd032
            r1=0x7fffd570 cr=0x40000042 xer=0 ctr=0x21940190
lock order reversal:
 1st 0x18d716c ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1064
 2nd 0x18f438c devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2047
KDB: stack backtrace:
0xe50727f0: at kdb_backtrace+0x4c
0xe5072810: at _witness_debugger+0x3c
0xe5072830: at witness_checkorder+0x8d0
0xe5072890: at __lockmgr_args+0xaf8
0xe5072910: at vop_stdlock+0x48
0xe5072930: at VOP_LOCK1_APV+0xec
0xe5072950: at _vn_lock+0x84
0xe50729a0: at vget+0xdc
0xe50729e0: at devfs_allocv+0x11c
0xe5072a20: at devfs_root+0x5c
0xe5072a60: at vfs_donmount+0x1458
0xe5072ca0: at nmount+0xd8
0xe5072ce0: at trap+0x460
0xe5072da0: at powerpc_interrupt+0x15c
0xe5072dd0: user SC trap by 0x218d2788: srr1=0xd032
            r1=0x7fffcd10 cr=0x20000044 xer=0 ctr=0x218d2780




Marcel Moolenaar wrote:
>
> On Nov 13, 2008, at 10:39 AM, Ross Gohlke wrote:
>
>> ## UP
>> % dmesg
>> FreeBSD 8.0-CURRENT #0: Tue Nov 11 15:01:01 CST 2008
>>    root at rorty.grinz.com:/usr/obj/usr/src/sys/RORTY.8
>> WARNING: WITNESS option enabled, expect reduced performance.
>> cpu0: Motorola PowerPC 7455 revision 2.1, 1000.00 MHz
>> cpu0: HID0 8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>
>> real memory  = 2135240704 (2036 MB)
>> avail memory = 2067062784 (1971 MB)
>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>> cpu0: dev=ff87f908 (BSP)
>> cpu1: dev=ff880bc8
>
> Hmmm, this is not an UP kernel. UP kernels don't count CPUs
> and don't announce themselves with/as FreeBSD/SMP.
>
> You need to remove the SMP option from your configuration
> in order to create an UP kernel.
>
> FYI,
>


-- 
Ross Gohlke > http://www.GRINZ.com
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