On Tue, 2007-12-06 at 11:19 +0200, Johannes Berg wrote: > On Mon, 2007-06-11 at 08:23 -0400, jamal wrote:
> > Sure. Packets stashed on the any DMA ring are considered "gone to the > > wire". That is a very valid assumption to make. > > Not at all! Packets could be on the DMA queue forever if you're feeding > out more packets. Heck, on most wireless hardware packets can even be > *expired* from the DMA queue and you get an indication that it was > impossible to send them. The spirit of the discussion you are quoting was much higher level than that. Yes what you describe can happen on any DMA (to hard-disk etc) A simpler example, if you tcpdump on an outgoing packet you see it on its way to the driver - it is accounted for as "gone"[1]. In any case, read the rest of the thread. cheers, jamal [1] Current Linux tcpdumping is not that accurate, but i dont wanna go into that discussion - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
