David Miller <da...@davemloft.net> : [...] > One theory is that the interrupt masking isn't working properly > and interrupts are still arriving and hitting the NAPI state even > when we are actively polling NAPI. > > And this problem was masked by the locking done here.
Yes. Ville, can you rule out irq sharing between the 8139 and some other device ? It's a candidate for unexpected interrupt handler invocation with older pc, even with properly working hardware. -- Ueimor