netdev - Re: appearing again: kernel: eth0: too many iterations (6) in nv_nic

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Date:	Mon, 28 Jan 2008 23:52:50 -0200
From:	carlos@...ica.ufpr.br (Carlos Carvalho)
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	netdev@...r.kernel.org
Subject: Re: appearing again: kernel: eth0: too many iterations (6) in
 nv_nic_irq

Stephen Hemminger (shemminger@...ux-foundation.org) wrote on 28 January 2008 08:06:
 >On Mon, 28 Jan 2008 11:32:55 -0200
 >carlos@...ica.ufpr.br (Carlos Carvalho) wrote:
 >
 >> It seems that this problem with NVidia's nic comes up more and more...
 >> From time to time we get this in the log:
 >> 
 >> Jan 27 14:43:12 duvel kernel: eth0: too many iterations (6) in nv_nic_irq.
 >> 
 >> We algo get
 >> 
 >> Jan 27 11:32:43 duvel kernel: KERNEL: assertion ((int)tcp_packets_in_flight(tp) >= 0) failed at net/ipv4/tcp_input.c (1274)
 >> 
 >> But at different moments, as shown above. Are they related? What's the
 >> meaning of the "assertion failed" one?
 >> 
 >> The messages are more likely to appear when traffic is high
 >> (>500Mb/s). This is with 2.6.22.16.
 >> 
 >> Any suggestions?
 >
 >Use NAPI which is available as configuration option in this driver.

Already in use.

 >Increase the max_interrupt_work from the ridiculously low value of 5
 >to something more larger like 15, with module parameter in
 >/etc/modprobe.d/options:
 >
 >options forcedeth max_interrupt_work=15

Will try.

 >Also, see if you motherboard supports MSI, if so add "msi=1" module parameter

It does, I have this in the config:

CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y

How can I set these options with the driver compiled in the kernel and
not as a module? I can change the max_interrupt_work in the source but
what about msi?

Any ideas about the assertion ((int)tcp_packets_in_flight...?
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