netdev - Re: NIU driver: Sun x8 Express Quad Gigabit Ethernet Adapter

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Date:	Wed, 05 Nov 2008 08:05:44 +0100
From:	Jesper Dangaard Brouer <jdb@...x.dk>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: NIU driver: Sun x8 Express Quad Gigabit Ethernet Adapter

On Tue, 2008-11-04 at 13:42 -0800, David Miller wrote:
> From: Jesper Dangaard Brouer <jdb@...x.dk>
> Date: Tue, 04 Nov 2008 15:45:09 +0100
> 
> > I just bought the Sun x8 Express Quad Gigabit Ethernet Adapter you
> > recommended to me.  It seem to work with the NIU driver (I can ping
> > through the box), but I get a kernel warning when spamming it with
> > pktgen...
> > 
> > Where do I go from here?
> > And what do you want me to try?
> 
> Looks like the transmitter is wedged.

I have attached niu related output from kern.log.
(cat /var/log/kern.log | grep niu | awk -F'kernel:' '{print $2}')

> Using current sources I assume?

Yes, your latest tree.  Both with and without your latest change to the
niu driver (niu: Use pci_ioremap_bar().).

Also tried a debian 2.6.26-1-686, that kernel actually crashed (in
net_rx_action, __do_softirq, do_softirq, irq_exit, do_IRQ, mwait_idle).

A strange observation is the IRQ allocations seen via /proc/interrupts:
(e.g. eth2 has assigned no less than 12 IRQs !?!)

dcu-router-ng:~# cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
  0:        123          1          0          1   IO-APIC-edge      timer
  1:          1          0          0          1   IO-APIC-edge      i8042
  3:          2          2          1          2   IO-APIC-edge      serial
  9:          0          0          0          0   IO-APIC-fasteoi   acpi
 12:          0          1          2          1   IO-APIC-edge      i8042
 14:         15         14         13         15   IO-APIC-edge      ata_piix
 15:          0          0          0          0   IO-APIC-edge      ata_piix
 16:        404        412        424        367   IO-APIC-fasteoi   uhci_hcd:usb1, ehci_hcd:usb6, eth0
 17:          0          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb2, eth3
 18:          8          9          8          9   IO-APIC-fasteoi   uhci_hcd:usb3
 19:          0          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 20:          0          0          0          0   PCI-MSI-edge      eth2
 21:        963        959        942        997   IO-APIC-fasteoi   ipmi_si, eth2
 22:         23         23         24         23   IO-APIC-fasteoi   uhci_hcd:usb5, eth2
 23:          0          0          0          0   PCI-MSI-edge      eth2
 24:          0          0          0          0   PCI-MSI-edge      eth2
 25:          0          0          0          0   PCI-MSI-edge      eth2
 26:          0          0          0          0   PCI-MSI-edge      eth2
 27:          0          0          0          0   PCI-MSI-edge      eth2
 28:          0          0          0          0   PCI-MSI-edge      eth2
 29:          0          0          0          0   PCI-MSI-edge      eth2
 30:          0          0          0          0   PCI-MSI-edge      eth2
 31:          0          0          0          0   PCI-MSI-edge      eth2
 32:          0          0          0          0   PCI-MSI-edge      eth2
 34:        318        310        319        317   PCI-MSI-edge      cciss0
NMI:          0          0          0          0   Non-maskable interrupts
LOC:      89420     334612     485037     172341   Local timer interrupts
RES:        101        270        159        174   Rescheduling interrupts
CAL:         83        132        122         74   Function call interrupts
TLB:        259        226        350        315   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
SPU:          0          0          0          0   Spurious interrupts
ERR:          0
MIS:          0

-- 
Med venlig hilsen / Best regards
  Jesper Brouer
  ComX Networks A/S
  Linux Network developer
  Cand. Scient Datalog / MSc.
  Author of http://adsl-optimizer.dk
  LinkedIn: http://www.linkedin.com/in/brouer

View attachment "niu_kern.log" of type "text/x-log" (4992 bytes)