>
>
> ----- Original Message -----
> > Hi,
> > this host (used as a zfs server), was working since 8.2, actually was
> > working
> > nicely under 9.1, but after upgrading to the latest 9.2, it panics, 2 days
> > in a row. Appart of being a newer version, it's now dataless while I run it
> > through the loops - which could be the reason for the panics, so while I
> > prepare
> > it to run off a local disk, and see if that mitigates the problem,
> > could someone take a look?
> >
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 21; apic id = 25
> > fault virtual address = 0xfffffffffffffcc0
> > fault code = supervisor read data, page not present
> > instruction pointer = 0x20:0xffffffff80d17f66
> > stack pointer = 0x28:0xffffff8d77b415b0
> > frame pointer = 0x28:0xffffff8d77b415f0
> > code segment = base 0x0, limit 0xfffff, type 0x1b
> > = DPL 0, pres 1, long 1, def32 0, gran 1
> > processor eflags = interrupt enabled, resume, IOPL = 0
> > current process = 89 (txg_thread_enter)
> > trap number = 12
> > panic: page fault
> > cpuid = 21
> > KDB: stack backtrace:
> > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a/frame
> > 0xffffff8d77b41040
> > kdb_backtrace() at kdb_backtrace+0x37/frame 0xffffff8d77b41100
> > panic() at panic+0x1ce/frame 0xffffff8d77b41200
> > trap_fatal() at trap_fatal+0x290/frame 0xffffff8d77b41260
> > trap_pfault() at trap_pfault+0x211/frame 0xffffff8d77b412f0
> > trap() at trap+0x344/frame 0xffffff8d77b414f0
> > calltrap() at calltrap+0x8/frame 0xffffff8d77b414f0
> > --- trap 0xc, rip = 0xffffffff80d17f66, rsp = 0xffffff8d77b415b0, rbp =
> > 0xffffff8d77b415f0 ---
> > bcopy() at bcopy+0x16/frame 0xffffff8d77b415f0
> > kthread_add() at kthread_add+0xe4/frame 0xffffff8d77b41710
> > kproc_kthread_add() at kproc_kthread_add+0xe1/frame 0xffffff8d77b418c0
> > spa_sync() at spa_sync+0x8d1/frame 0xffffff8d77b41990
> > txg_sync_thread() at txg_sync_thread+0x139/frame 0xffffff8d77b41aa0
> > fork_exit() at fork_exit+0x11f/frame 0xffffff8d77b41af0
> > fork_trampoline() at fork_trampoline+0xe/frame 0xffffff8d77b41af0
> > --- trap 0, rip = 0, rsp = 0xffffff8d77b41bb0, rbp = 0 ---
> > Uptime: 21h5m46s
> >
>
> The serialization in kthread_add() is wrong. It is possible for the
> oldtd it selects to exit and be reaped before we are able duplicate
> the copy region. I have a local patch for this, and I talked with
> julian@ & jhb@ about it a few weeks ago but haven't sent them a
> patch for review. I'll get to that later today.
If you need to have it checked out, I can try it out.
thanks,
danny
>
>
> > more info at:
> > ftp://ftp.cs.huji.ac.il/users/danny/freebsd/core.txt/1
> >
> > thanks,
> > danny
> >
> >
> > _______________________________________________
> > freebsd-stable@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-stable
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> >
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