Messages in this thread | | | Subject | Re: QUESTION: Network hangs with BP6 and 2.4.x kernels, hardware | Date | Sat, 13 Jan 2001 00:43:25 +0000 (GMT) | From | Alan Cox <> |
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> interrupt_handler() > { > status = readl(dev->status); > if (status & MY_IRQ_DISABLE) > return;
Unfortunately on the 8390 the IRQ statud register is on page 0. The code on the other CPU might not be on page 0. That means we can't even safely check if there is an irq pending or clear it down (bad news on ne2k-pci) without getting that lock.
That means we have to be able to just block that one irq source to avoid horrible SMP latency problems.
Alan
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