netdev - Re: [PATCH net-next v4] rps: selective flow shedding during softnet overflow

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Message-ID: <20130423170316.52c1adca@nehalam.linuxnetplumber.net>
Date:	Tue, 23 Apr 2013 17:03:16 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com, willemb@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v4] rps: selective flow shedding during softnet
 overflow

On Tue, 23 Apr 2013 19:15:40 -0400 (EDT)
David Miller <davem@...emloft.net> wrote:

> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Tue, 23 Apr 2013 16:11:23 -0700
> 
> > I guess we should at least not include this code on !SMP builds
> 
> I think CONFIG_RPS already an appropriate guard for something like
> this.  And it depends upon SMP et al.
> 

I wasn't meaning to say flow shedding is a bad idea, just would love
to see a general solution. We are all concerned with DoS attacks.
If you haven't been hit yet, somebody you know is already.
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