00:10.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone]
I saw these in kernel log:
eth0: Too much work in interrupt, status e481.
eth0: Too much work in interrupt, status e081.
After these, the interface is still up but nothing goes through it, ie. it
looks like a black hole.
ifdown eth0 ; ifup eth0 fixes that.
max_interrupt_work can probably be tuned, but that's not the real problem.
should wake up back after having too much work when there is no longer so
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