On Mon, 2009-10-26 at 07:54 +0000, Jarek Poplawski wrote: > > No, I wrote that I didn't know. I suppose now that I looked at it I do > > know, and only disabling preemption is required. > > But netif_rx has preemption disabled most of the time (by hardirqs > disabling). So maybe disabling preemption isn't the main reason here > either? Not for netpoll though, which may or may not be relevant (if I were to venture a guess I'd say it isn't and it disables preemption to be able to do the softirq thing) However, I lost track now of why we're discussing this. Basically it boils down to using netif_rx() when in (soft)irq, and netif_rx_ni() when in process context. That could just be an optimisation, but it's a very valid one. johannes
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