netdev - Re: [net-next 11/13] igb: Make Tx budget for NAPI user adjustable

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Message-Id: <20110919.165708.2092635575746194747.davem@davemloft.net>
Date:	Mon, 19 Sep 2011 16:57:08 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	alexander.h.duyck@...el.com, netdev@...r.kernel.org,
	gospo@...hat.com
Subject: Re: [net-next 11/13] igb: Make Tx budget for NAPI user adjustable

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Sat, 17 Sep 2011 01:04:35 -0700

> From: Alexander Duyck <alexander.h.duyck@...el.com>
> 
> This change is meant to make the NAPI budget limits for transmit
> adjustable.  By doing this it is possible to tune the value for optimal
> performance with applications such as routing.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> Tested-by:  Aaron Brown  <aaron.f.brown@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

As Ben and I have mentioned, this change is not acceptable.

Ethtool settings for "hardware interrupt" coalescing and mitigation
should have no effect on NAPI behavior.
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