panic in vgonel()

[Kostik Belousov]

On Fri, Aug 07, 2009 at 04:37:07PM +0400, pluknet wrote:
> 2009/8/7 Kostik Belousov <kostikbel at gmail.com>:
> > On Fri, Aug 07, 2009 at 03:37:11PM +0400, pluknet wrote:
> >> This is on 7.2-R amd64.
> >>
> >> I'm curious if it might be due to glusterfs on it.
> >>
> >> Fatal trap 12: page fault while in kernel mode
> >> cpuid = 3; apic id = 03
> >> fault virtual address   = 0x0
> >> fault code              = supervisor write data, page not present
> >> instruction pointer     = 0x8:0xffffffff805a52ba
> >> stack pointer           = 0x10:0xfffffffefc3474a0
> >> frame pointer           = 0x10:0xfffffffefc347510
> >> code segment            = base 0x0, limit 0xfffff, type
> >>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> >> processor eflags        = interrupt enabled, resume, IOPL = 0
> >> current process         = 35425 (find)
> >>
> >> db> bt
> >> Tracing pid 35425 tid 100194 td 0xffffff003c165370
> >> vgonel() at vgonel+0x1aa
> >> vnlru_free() at vnlru_free+0x36c
> >> getnewvnode() at getnewvnode+0x281
> >> ffs_vgetf() at ffs_vgetf+0xdf
> >> ufs_lookup() at ufs_lookup+0x2dd
> >> vfs_cache_lookup() at vfs_cache_lookup+0xf3
> >> VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x40
> >> lookup() at lookup+0x598
> >> namei() at namei+0x33e
> >> kern_lstat() at kern_lstat+0x5e
> >> lstat() at lstat+0x2a
> >> syscall() at syscall+0x256
> >> Xfast_syscall() at Xfast_syscall+0xab
> >> --- syscall (190, FreeBSD ELF64, lstat), rip = 0x80071063c, rsp =
> >> 0x7fffffffea48, rbp = 0x800a06910 ---
> >
> > Did you got the vmcore ? If yes, please find the value for vgonel()
> > argument, vp, and print the vnode content.
> 
> I didn't. Same problem as in my another mail. :(
> 
> >
> > Regardless of this, look up the source line for vgonel+0x1aa.
> >
> 
> I could resolve only address which belongs to instruction pointer
> = 0x8:0xffffffff805a52ba
> (eh, I don't know if I should sum these numbers, so I did this for both cases):
> 
> dev2# addr2line -e /boot/kernel/kernel.symbols 0xffffffff805a52ba
> /usr/src/sys/kern/vfs_subr.c:979
> delmntque():        TAILQ_REMOVE(&mp->mnt_nvnodelist, vp, v_nmntvnodes);
> 
> dev2# addr2line -e /boot/kernel/kernel.symbols 0xffffffff805a52c2
> /usr/src/sys/kern/vfs_subr.c:981
> delmntque():        MNT_REL(mp);

load kernel.debug into gdb, and then do "list *(vgonel+0x1aa)"
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