Re: [Xen-devel] panic in e100_exec_cb()

[Paul Dorman <pauld@xxxxxxxxx>]

Yes, I get the same thing. Server reboots right after the line 
'e1000_watchdog: NIC link is up...' (similar hardware to yours no doubt). I 
don't see any messages. It sits for about 10 seconds before restarting.

I do see this in the syslog, which appears strange to me:

Xen1 kernel: Symbols match kernel version 2.6.8.
Xen1 kernel: No module symbols loaded - kernel modules not enabled.

Also:

Xen1 kernel: Kernel command line: /boot/vmlinuz-2.6.8.1-xen0 root=/dev/sda1 ro 
console=tty0 console=ttyS0
Xen1 kernel: Unknown boot option `/boot/vmlinuz-2.6.8.1-xen0' : ignoring

By grub boot instructions are: 

kernel /boot/xen.gz dom0_mem=131072 com21=115200,8n1
module /boot/vmlinuz-2.6.8.1-xen0 root=/dev/sda1 ro console=tty0 console=ttyS0

Is this not correct for the 2.6.x kernels?

Regards,
Paul


On Tuesday 21 September 2004 10:22 am, Charles Coffing wrote:
> With today's build, my domain 0 crashes during boot when it tries to
> bring eth0 up (it's an E100).
>
> cb->prev (eax) is NULL in e100_exec_cb() (e100.c:827).  Just from code
> inspection, I don't see how this can be.  e100_alloc_cbs() was just
> called, which looks like it should have correctly linked up all the
> cb->prev/cb->next pointers.
>
> It happens regardless of CONFIG_XEN_WRITABLE_PAGETABLES.
>
> Has anyone else seen this?
>
>
> e100: eth0: e100_watchdog: link up, 100Mbps, full-duplex
> Unable to handle kernel NULL pointer dereference at virtual address
> 00000002
>  printing eip:
> c022d6d2
> *pde = ma 00000000 pa 55555000
>  [<c022ea3a>] e100_alloc_cbs+0x74/0x140
>  [<c022f5bb>] e100_up+0x39/0x1d6
>  [<c0127f8b>] queue_delayed_work+0x50/0x6d
>  [<c02307b3>] e100_open+0x23/0x69
>  [<c031198b>] dev_open+0x8a/0xe6
>  [<c0312e6e>] dev_change_flags+0x51/0x11f
>  [<c03479d6>] devinet_ioctl+0x4f1/0x5b2
>  [<c03496b9>] inet_ioctl+0x7e/0xa8
>  [<c030a026>] sock_ioctl+0x184/0x25d
>  [<c015c4e6>] sys_ioctl+0x16f/0x211
>  [<c010d1b7>] syscall_call+0x7/0xb
> Oops: 0002 [#1]
> Modules linked in:
> CPU:    0
> EIP:    0061:[<c022d6d2>]    Not tainted
> EFLAGS: 00013202   (2.6.8.1-xen0)
> EIP is at e100_hw_init+0x19c/0x6e3
> eax: 00000000   ebx: c66c8000   ecx: 00000005   edx: c7c19220
> esi: c7c19220   edi: 0000003f   ebp: 00000000   esp: c73cfe40
> ds: 0069   es: 0069   ss: 0069
> Process ip (pid: 1708, threadinfo=c73ce000 task=c745a680)
> Stack: c7c19220 c66c8000 00000000 00000040 c7c19220 00000000 c022ea3a
> c1199844
>        00006700 c7c19484 00000000 00000000 00000000 c7c19220 c7c19220
> 00000000
>        c022f5bb c7c19220 c7fee260 0000004f c0127f8b c03f6698 c7c19000
> 00000000
> Call Trace:
>  [<c022ea3a>] e100_alloc_cbs+0x74/0x140
>  [<c022f5bb>] e100_up+0x39/0x1d6
>  [<c0127f8b>] queue_delayed_work+0x50/0x6d
>  [<c02307b3>] e100_open+0x23/0x69
>  [<c031198b>] dev_open+0x8a/0xe6
>  [<c0312e6e>] dev_change_flags+0x51/0x11f
>  [<c03479d6>] devinet_ioctl+0x4f1/0x5b2
>  [<c03496b9>] inet_ioctl+0x7e/0xa8
>  [<c030a026>] sock_ioctl+0x184/0x25d
>  [<c015c4e6>] sys_ioctl+0x16f/0x211
>  [<c010d1b7>] syscall_call+0x7/0xb
> Code: 66 81 60 02 ff bf 8b 86 14 01 00 00 3b 86 10 01 00 00 3e 75
>
>
>
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