netdev - Re: [PATCH 1/2] average: provide macro to create static EWMA

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Date:	Fri, 14 Aug 2015 08:44:12 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	David Miller <davem@...emloft.net>
Cc:	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] average: provide macro to create static EWMA

On Thu, 2015-08-13 at 17:26 -0700, David Miller wrote:
> From: Johannes Berg <johannes@...solutions.net>
> Date: Thu, 13 Aug 2015 11:11:48 +0200
> 
> > From: Johannes Berg <johannes.berg@...el.com>
> > 
> > Having the EWMA parameters stored in the runtime struct imposes
> > memory requirements for the constant values that could just be
> > inlined in the code. This particularly makes sense if there are
> > a lot of such structs, for example in mac80211 in the station
> > table where each station has a number of these in an array, and
> > there can be many stations.
> > 
> > Provide a macro DECLARE_EWMA() that declares the necessary struct
> > and inline functions to access it with the parameters hard-coded;
> > using this also means the user no longer needs to 'select AVERAGE'
> > as it's entirely self-contained.
> > 
> > In the mac80211 case, on x86-64, this actually slightly *reduces*
> > code size, while also saving 80 bytes of runtime memory per sta.
> > 
> > Signed-off-by: Johannes Berg <johannes.berg@...el.com>
> > ---
> > As the next patch relies on this, I'll take this through my tree
> > unless I hear objections.
> 
> This looks fine to me.
> 

Thanks, I've applied both.

johannes
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