On 08/13/2010 11:07 AM, John Culvertson wrote:
Thanks for the suggestions. I have tried the unpatched 2.6.33.7 kernel, and the problem does not occur. The hardware is a single board industrial computer with the network controllers onboard, so I cannot easily try different NICs. I have not seen the problem occur with only one port in use, but I have not tested that long enough to be positive. One thing that may be a little odd about this computer is that both Ethernet controllers (Intel 82559) share the same PCI interrupt. Interrupt sharing should be OK, but since adjacent PCI slots in normal PCs generally use different interrupts, it may not occur often in other systems.
Does it reproduce when you turn off PREEMPT_RT, but leave all the IRQ threading options enabled?
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