netdev - Re: [RFC PATCH v2 0/9] bql: Byte Queue Limits

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Message-ID: <20110808111917.4b2669de@nehalam.ftrdhcpuser.net>
Date:	Mon, 8 Aug 2011 11:19:17 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [RFC PATCH v2 0/9] bql: Byte Queue Limits

On Mon, 8 Aug 2011 11:01:57 -0700
Tom Herbert <therbert@...gle.com> wrote:

> > Since transmit completion means calling dev_kfree_skb() why not account
> > there? You could add some info to netdev if necessary to get compile
> > the statistics.
> >
> The algorithm depends on knowing the total number of packets competed
> in a single execution of transmit completion (epic based).  We only
> want to recalculate the limits once per completion, which happens when
> the completion function is called.

So just add some stats to netdev and count the number of dev_kfree_skb
calls and do your work at napi complete.
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