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Date: Mon, 11 Jun 2007 08:52:15 -0400 From: jamal <hadi@...erus.ca> To: Patrick McHardy <kaber@...sh.net> Cc: "Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>, davem@...emloft.net, netdev@...r.kernel.org, jeff@...zik.org, "Kok, Auke-jan H" <auke-jan.h.kok@...el.com> Subject: Re: [PATCH] NET: Multiqueue network device support. On Mon, 2007-11-06 at 14:39 +0200, Patrick McHardy wrote: > jamal wrote: > > On Mon, 2007-11-06 at 13:58 +0200, Patrick McHardy wrote: > > > > Sure. Packets stashed on the any DMA ring are considered "gone to the > > wire". That is a very valid assumption to make. > > > I disagree, its obviously not true Patrick, you are making too strong a statement. Take a step back: When you put a packet on the DMA ring, are you ever going to take it away at some point before it goes to the wire? > and leads to the behaviour I > described. If it were true there would be no reason to use multiple > HW TX queues to begin with. In the general case, they are totaly useless. They are useful when theres contention/congestion. Even in a shared media like wireless. And if there is contention, the qdisc scheduler will do the right thing. cheers, jamal - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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