Messages in this thread |  | | Date | Thu, 4 Oct 2001 08:35:02 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 |
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On Wed, 3 Oct 2001, jamal wrote:
> > i'm worried by the dev->quota variable a bit. As visible now in the > > 2.4.10-poll.pat and tulip-NAPI-010910.tar.gz code, it keeps calling the > > ->poll() function until dev->quota is gone. I think it should only keep > > calling the function until the rx ring is fully processed - and it should > > re-enable the receiver afterwards, when exiting net_rx_action. > > This would result in an unfairness. Think of one device which receives > packets really fast that it takes most of the CPU capacity just > processing it.
no, i asked something else.
i'm asking the following thing. dev->quota, as i read the patch now, can cause extra calls to ->poll() even though the RX ring of that particular device is empty and the driver has indicated it's done processing RX packets. (i'm now assuming that the extra-polling-for-a-jiffy line in the current patch is removed - that one is a showstopper to begin with.) Is this claim of mine correct?
Ingo
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