netdev - Re: [PATCH v2 net-next 00/14] net: extend busy polling support

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Date:	Wed, 18 Nov 2015 16:18:26 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	edumazet@...gle.com
Cc:	netdev@...r.kernel.org, eliezer.tamir@...ux.intel.com,
	eli@...lanox.com, eugenia@...lanox.com, ariel.elior@...gic.com,
	willemb@...gle.com, rida@...gle.com, eric.dumazet@...il.com
Subject: Re: [PATCH v2 net-next 00/14] net: extend busy polling support

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed, 18 Nov 2015 06:30:49 -0800

> This patch series extends busy polling range to tunnels devices,
> and adds busy polling generic support to all NAPI drivers.
> 
> No need to provide ndo_busy_poll() method and extra synchronization
> between ndo_busy_poll() and normal napi->poll() method.
> This was proven very difficult and bug prone.
> 
> mlx5 driver is changed to support busy polling using this new method,
> and a second mlx5 patch adds napi_complete_done() support and proper
> SNMP accounting.
> 
> bnx2x and mlx4 drivers are converted to new infrastructure,
> reducing kernel bloat and improving performance.
> 
> Latest patch, adding generic support, adds a new requirement :
> 
>  -free_netdev() and netif_napi_del() must be called from process context.
> 
> Since this might not be the case in some drivers, we might have to
> either : fix the non conformant drivers (by disabling busy polling on them)
> or revert this last patch.

I like this series a lot, and hope we can fix any fallout quickly and
painlessly.

Applied to net-next.
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