netdev - Re: [PATCH net] rtnetlink: fix frame size warning in rtnl_fill

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Message-ID: <1447713039.22599.78.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 16 Nov 2015 14:30:39 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net] rtnetlink: fix frame size warning in
 rtnl_fill_ifinfo

On Mon, 2015-11-16 at 23:18 +0100, Hannes Frederic Sowa wrote:
> > need something that handles all cases properly.
> 
> I just wanted to shut up the gcc warning which is added if a function
> uses more than 2048 bytes of stack space. We normally don't have the
> problem and could also divide the function into two, but I don't see a
> general solution to the problem. Mostly they need to be custom tailored
> to the specific usage.
> 
> I can have a look if we can use kmalloc based storage for the stats, but
> this also means that we add another NULL pointer check and error
> handling for those cases. Let me have a look!

Simply put the code different functions with noinline_for_stack


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