Re: [Xenomai-help] Xenomai and MSI enabled crashes kernel

[Jan Kiszka <jan.kiszka@domain.hid>]

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M. Koehrer wrote:
> Hi Jan,
> 
> here is the result of this patch.
> I patched in addition to Philippe's patches.
> 
> Regards
> 
> Mathias
> ---------
> Intel(R) PRO/1000 Network Driver - version 7.3.15-k2
> Copyright (c) 1999-2006 Intel Corporation.
> ACPI: PCI Interrupt 0000:05:00.0[A] -> GSI 16 (level, low) -> IRQ 16
> e1000: 0000:05:00.0: e1000_probe: (PCI Express:2.5Gb/s:Width x1) 00:30:48:5a:f9:0a
> e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
> BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
>  printing eip:
> dfedd3ca
> *pde = 00000000
> Oops: 0000 [#1]
> SMP
> Modules linked in: e1000
> CPU:    0
> EIP:    0060:[<dfedd3ca>]    Not tainted VLI
> EFLAGS: 00010082   (2.6.20.4 #7)
> EIP is at 0xdfedd3ca
> eax: c0112478   ebx: 00000001   ecx: c0114581   edx: df06c001
> esi: dfedf6c0   edi: dfedc240   ebp: 00000000   esp: df06ddf8
> ds: 007b   es: 007b   ss: 0068
> Process ifconfig (pid: 1242, ti=df06c000 task=c16f9030 task.ti=df06c000)
> Stack: 00000040 ffffffff 00000000 00000007 c03e6f00 000000ec 00000000 c03d9180
>        c010f1b5 c015291a decbe080 00000680 decbe080 00000724 c02d6dfd 00007600
>        00000001 00000060 e099a210 00000286 ffffff24 df7065c8 00000000 0000000f
> Call Trace:
>  [<c010f1b5>] __ipipe_handle_irq+0x26b/0x2bd

I must have patched crap into this, but I don't see it. Could someone
have a look why there is no printk output related to #IRQ 219
(~0xffffff24, see stack content)?

BTW, Mathias, forcing your kernel into single CPU mode via kernel
command line "cpus=1" doesn't expose the issue, right? Could we face
some kind of setup race across the CPUs here?

Thanks,
Jan


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