[Xenomai-help] Xenomai and MSI enabled crashes kernel

["M. Koehrer" <mathias_koehrer@domain.hid>]

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Hi everybody,

I am using kernel 2.6.20.4 and Xenomai 2.3.1 on a SMP enabled dual core Pentium 4.
Everything works fine when I do not enable the CONFIG_PCI_MSI (Messages signaled interrupts) for
PCI Express.
As I am always short with interrupts I want to use MSI for the PCIe base
I/O devices like Ethernet.

When I run the same kernel without any Xenomai patch, it works really fine.
My onboard PCIe e1000 network adapter will be loaded fine and gets the (cool) interrupt number 219!
Perfect!

When I use the Adeos patch from Xenomai 2.3.1 on this kernel the modprobe of the e1000 driver
leads to a kernel crash.
At this stage no real time application is running.
Using a serial console, I was able to log the kernel dump.
Here it is:

BUG: unable to handle
 kernel NULL pointer dereference at virtual address 00000000
 printing eip:
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: e1000
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00010086   (2.6.20.4 #7)
EIP is at _stext+0x3feffc70/0x14
eax: c0112244   ebx: 00000006   ecx: c011434d   edx: c168c000
esi: 00000006   edi: 00000046   ebp: ffffffff   esp: c168de20
ds: 007b   es: 007b   ss: 0068
Process ifconfig (pid: 1231, ti=c168c000 task=c1692a90 task.ti=c168c000)
Stack: c03e5680 000000db 00000000 c03d9100 c010ef83 00006d80 00000001 00000060
       e099a210 00000286 ffffff24 df77b5c8 00000000 0000000f 00000001 c0103439
       df77b5c8 e099a0ff e09c0000 00000000 0000000f 00000001 80080740 dfd2007b
Call Trace:
 [<c010ef83>] __ipipe_handle_irq+0x1b9/0x20b
 [<e099a210>] e1000_set_multi+0x111/0x189 [e1000]
 [<c0103439>] common_interrupt+0x21/0x38
 [<e099a0ff>] e1000_set_multi+0x0/0x189 [e1000]
 [<e099a210>] e1000_set_multi+0x111/0x189 [e1000]
 [<c02dcf81>] __dev_mc_upload+0x1d/0x1e
 [<c02dd0a1>] dev_mc_upload+0x24/0x37
 [<c02db5ac>] dev_open+0x44/0x62
 [<c02da079>] dev_change_flags+0x47/0xe4
 [<c030d192>] devinet_ioctl+0x252/0x56f
 [<c02db18a>] dev_ifsioc+0x113/0x38d
 [<c02d15a4>] sock_ioctl+0x0/0x1ad
 [<c02d1732>] sock_ioctl+0x18e/0x1ad
 [<c02d15a4>] sock_ioctl+0x0/0x1ad
 [<c015e18f>] do_ioctl+0x1f/0x62
 [<c015e416>] vfs_ioctl+0x244/0x256
 [<c015e45b>] sys_ioctl+0x33/0x4c
 [<c01029f3>] sysenter_past_esp+0x6c/0x70
 =======================
Code:  Bad EIP value.
EIP: [<00000000>] _stext+0x3feffc70/0x14 SS:ESP 0068:c168de20
 <0>Kernel panic - not syncing: Fatal exception in interrupt
 BUG: at arch/i386/kernel/smp.c:565 smp_call_function()
 [<c010b903>] smp_call_function+0x66/0x10a
 [<c0118e12>] printk+0x62/0xd5
 [<c010b9c2>] smp_send_stop+0x1b/0x2b
 [<c01183ad>] panic+0x4d/0xe4
 [<c0103f71>] die+0x1f2/0x226
 [<c011167c>] do_page_fault+0x447/0x517
 [<c010f61d>] __ipipe_handle_exception+0xce/0x158
 [<c010bb1e>] smp_call_function_interrupt+0x31/0x4c
 [<c033336d>] error_code+0x81/0x90
 [<c011434d>] try_to_wake_up+0x33c/0x346
 [<c0112244>] __activate_task+0x1c/0x29
 [<c010ef83>] __ipipe_handle_irq+0x1b9/0x20b
 [<e099a210>] e1000_set_multi+0x111/0x189 [e1000]
 [<c0103439>] common_interrupt+0x21/0x38
 [<e099a0ff>] e1000_set_multi+0x0/0x189 [e1000]
 [<e099a210>] e1000_set_multi+0x111/0x189 [e1000]
 [<c02dcf81>] __dev_mc_upload+0x1d/0x1e
 [<c02dd0a1>] dev_mc_upload+0x24/0x37
 [<c02db5ac>] dev_open+0x44/0x62
 [<c02da079>] dev_change_flags+0x47/0xe4
 [<c030d192>] devinet_ioctl+0x252/0x56f
 [<c02db18a>] dev_ifsioc+0x113/0x38d
 [<c02d15a4>] sock_ioctl+0x0/0x1ad
 [<c02d1732>] sock_ioctl+0x18e/0x1ad
 [<c02d15a4>] sock_ioctl+0x0/0x1ad
 [<c015e18f>] do_ioctl+0x1f/0x62
 [<c015e416>] vfs_ioctl+0x244/0x256
 [<c015e45b>] sys_ioctl+0x33/0x4c
 [<c01029f3>] sysenter_past_esp+0x6c/0x70
 =======================

I have attached my kernel config to this mail.
Any idea on this? Is there anybody out there that has MSI running succesfully with the Xenomai adeos patch?

Thanks for any feedback on that issue!

Regards

Mathias


-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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