Kernel panic in FreeBSD-8.3 from UFS

[Desai, Kashyap]

Hi,

We have seen kernel panic while doing IO along with HBA reset. This looks to be very rare but not sure if someone can help me to understand what is a issue here. To me it does not look any issue with underline Device Driver <mps> 

See below back trace.


#0  doadump (textdump=1) at pcpu.h:244
244	pcpu.h: No such file or directory.
	in pcpu.h
(kgdb) #0  doadump (textdump=1) at pcpu.h:244
#1  0xc0a1845a in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:442
#2  0xc0a186f1 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:607
#3  0xc0c7ceda in kmem_malloc (map=0xc15c808c, size=32768, flags=2)
    at /usr/src/sys/vm/vm_kern.c:334
#4  0xc0c708e7 in page_alloc (zone=0x0, bytes=32768, pflag=0xf19839bf "\002", 
    wait=2) at /usr/src/sys/vm/uma_core.c:994
#5  0xc0c72fe0 in uma_large_malloc (size=32768, wait=2)
    at /usr/src/sys/vm/uma_core.c:3067
#6  0xc0a04fac in malloc (size=32768, mtp=0xc102b808, flags=2)
    at /usr/src/sys/kern/kern_malloc.c:492
#7  0xc0c42e89 in softdep_disk_io_initiation (bp=0xdef881fc)
    at /usr/src/sys/ufs/ffs/ffs_softdep.c:10126
#8  0xc0c5208f in ffs_geom_strategy (bo=0xc5fc30ac, bp=0xdef881fc)
    at buf.h:411
#9  0xc0c65a43 in ufs_strategy (ap=0xf1983b00)
    at /usr/src/sys/ufs/ufs/ufs_vnops.c:2317
#10 0xc0d6a6dd in VOP_STRATEGY_APV (vop=0xc102e4a0, a=0xf1983b00)
    at vnode_if.c:2171
#11 0xc0a8d19e in bufstrategy (bo=0xc6b901bc, bp=0xdef881fc) at vnode_if.h:940
#12 0xc0a9352e in bufwrite (bp=0xdef881fc) at buf.h:404
#13 0xc0a8db5c in vfs_bio_awrite (bp=0xdef881fc) at buf.h:392
#14 0xc0c584c5 in ffs_syncvnode (vp=0xc6b90110, waitfor=1)
    at /usr/src/sys/ufs/ffs/ffs_vnops.c:288
#15 0xc0c58739 in ffs_fsync (ap=0xf1983c4c)
    at /usr/src/sys/ufs/ffs/ffs_vnops.c:187
#16 0xc0d69712 in VOP_FSYNC_APV (vop=0xc102dfc0, a=0xf1983c4c)
    at vnode_if.c:1267
#17 0xc0ab5d49 in sys_fsync (td=0xc64ea8a0, uap=0xf1983cec) at vnode_if.h:549
#18 0xc0d49315 in syscall (frame=0xf1983d28) at subr_syscall.c:131
#19 0xc0d32af1 in Xint0x80_syscall ()
    at /usr/src/sys/i386/i386/exception.s:266
#20 0x00000033 in ?? (


To me it looks like UFS is doing something to crash the kernel.

` Kashyap