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Date:      Sat, 31 Jan 2015 15:31:39 -0800
From:      "K. Macy" <kmacy@freebsd.org>
To:        bugzilla-noreply@freebsd.org
Cc:        "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>
Subject:   Re: [Bug 188369] [xen] [panic] FreeBSD 10 XENHVM panic under NetBSD Dom0 (xn_txeof: WARNING: response is -1)
Message-ID:  <CAHM0Q_MHvW4iDWepNre5_KE7C70qi%2BwhmaZuZKob1LVo3Ab13g@mail.gmail.com>
In-Reply-To: <bug-188369-23905-FXjalwo4fD@https.bugs.freebsd.org/bugzilla/>
References:  <bug-188369-23905@https.bugs.freebsd.org/bugzilla/> <bug-188369-23905-FXjalwo4fD@https.bugs.freebsd.org/bugzilla/>

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load the kernel in to gdb or kgdb and type: i li *xn_intr+0x74 to get
the offending line number

On Sat, Jan 31, 2015 at 6:44 AM,  <bugzilla-noreply@freebsd.org> wrote:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=188369
>
> --- Comment #9 from miguelmclara@gmail.com ---
> One thing to note is that the panic is not related to the "mbuf already on the
> free list" anymore:
>
>
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0x3
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0xffffffff80800c65
> stack pointer           = 0x28:0xfffffe00002b29d0
> frame pointer           = 0x28:0xfffffe00002b2a20
> 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         = 12 (irq771: xn0)
> trap number             = 12
> panic: page fault
> cpuid = 0
> KDB: stack backtrace:
> #0 0xffffffff8095b050 at kdb_backtrace+0x60
> #1 0xffffffff8091f745 at panic+0x155
> #2 0xffffffff80d1edff at trap_fatal+0x38f
> #3 0xffffffff80d1f118 at trap_pfault+0x308
> #4 0xffffffff80d1e77a at trap+0x47a
> #5 0xffffffff80d04492 at calltrap+0x8
> #6 0xffffffff808027e4 at xn_intr+0x74
> #7 0xffffffff808f255b at intr_event_execute_handlers+0xab
> #8 0xffffffff808f29a6 at ithread_loop+0x96
> #9 0xffffffff808f017a at fork_exit+0x9a
> #10 0xffffffff80d049ce at fork_trampoline+0xe
>
> --
> You are receiving this mail because:
> You are the assignee for the bug.
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