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Date:	Tue, 12 Jun 2007 11:19:57 +0200
From:	Johannes Berg <>
Cc:	Patrick McHardy <>,
	"Waskiewicz Jr, Peter P" <>,,,,
	"Kok, Auke-jan H" <>
Subject: Re: [PATCH] NET: Multiqueue network device support.

On Mon, 2007-06-11 at 08:23 -0400, jamal wrote:
> On Mon, 2007-11-06 at 13:58 +0200, Patrick McHardy wrote:
> > Thats not true. Assume PSL has lots of packets, PSH is empty. We
> > fill the PHL queue until their is no room left, so the driver
> > has to stop the queue. 
> 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.


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