netdev - Re: ixgbe: normalize frag

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Message-Id: <20101004.113258.212671454.davem@davemloft.net>
Date:	Mon, 04 Oct 2010 11:32:58 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	alexander.h.duyck@...el.com
Cc:	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	bruce.w.allan@...el.com, netdev@...r.kernel.org
Subject: Re: ixgbe: normalize frag_list usage

From: Alexander Duyck <alexander.h.duyck@...el.com>
Date: Mon, 04 Oct 2010 11:04:18 -0700

> This will not work for RSC due to the fact that it assumes only one
> RSC context is active per ring and that is not the case.  There can be
> multiple RSC combined flows interlaced on the ring.

Thanks for looking at this Alexander.

I must have mis-understood what the current code is doing.

It looked like RSC packets always show up in-order in the RX ring.

And that they are scanned for by simply combining any sequence of
non-EOP packets up to and including the final EOP one into a frag
list.

Are the RSC packets are identified via something else entirely?
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