Messages in this thread | | | Subject | Re: [PATCH 00/28] Swap over NFS -v16 | From | Peter Zijlstra <> | Date | Fri, 07 Mar 2008 12:55:31 +0100 |
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On Fri, 2008-03-07 at 12:17 +0100, Peter Zijlstra wrote:
> That would be so if the whole path from RX to socket demux would have > hard-irqs disabled. However I didn't see that. Moreover I think the > whole purpose of the NetPoll interface is to allow some RX queueing to > cut down on softirq overhead.
s/NetPoll/NAPI/
More specifically look at net/core/dev.c:netif_rx() It has a input queue per device.
> > 2/ If the host is routing network packets, then incoming packets > > might go on an outbound queue. Is this space limited? and > > included in the reserve? > > Not sure, somewhere along the routing code I lost it again. Constructive > input from someone versed in that part of the kernel would be most > welcome.
To clarify, I think we just send it on as I saw no reason why that could fail. However the more fancy stuff like engress or QoS might spoil the party, that is where I lost track.
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