From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH net-next v4] rps: selective flow shedding during softnet overflow Date: Tue, 23 Apr 2013 17:03:16 -0700 Message-ID: <20130423170316.52c1adca@nehalam.linuxnetplumber.net> References: <1366749094-5982-1-git-send-email-willemb@google.com> <20130423.184140.2020239496583590253.davem@davemloft.net> <1366758683.8964.37.camel@edumazet-glaptop> <20130423.191540.217250507483659201.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: eric.dumazet@gmail.com, willemb@google.com, netdev@vger.kernel.org To: David Miller Return-path: Received: from mail-pb0-f47.google.com ([209.85.160.47]:41294 "EHLO mail-pb0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751411Ab3DXADU (ORCPT ); Tue, 23 Apr 2013 20:03:20 -0400 Received: by mail-pb0-f47.google.com with SMTP id rq13so284087pbb.6 for ; Tue, 23 Apr 2013 17:03:20 -0700 (PDT) In-Reply-To: <20130423.191540.217250507483659201.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 23 Apr 2013 19:15:40 -0400 (EDT) David Miller wrote: > From: Eric Dumazet > 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.