From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933201AbcFOOzY (ORCPT ); Wed, 15 Jun 2016 10:55:24 -0400 Received: from www.linutronix.de ([62.245.132.108]:40480 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932370AbcFOOzU (ORCPT ); Wed, 15 Jun 2016 10:55:20 -0400 Date: Wed, 15 Jun 2016 16:53:12 +0200 (CEST) From: Thomas Gleixner To: Eric Dumazet cc: Peter Zijlstra , Arjan van de Ven , Ingo Molnar , LKML , "Paul E. McKenney" , Frederic Weisbecker , Chris Mason , Arjan van de Ven , Linus Torvalds Subject: Re: [patch 13/20] timer: Switch to a non cascading wheel In-Reply-To: Message-ID: References: <20160613070440.950649741@linutronix.de> <20160613075929.282143900@linutronix.de> <20160613114005.GY30909@twins.programming.kicks-ass.net> <20160614101144.GA849@gmail.com> <20160614204225.GI30154@twins.programming.kicks-ass.net> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 14 Jun 2016, Eric Dumazet wrote: > Original TCP RFCs tell timeout is infinite ;) > > Practically, conntrack has a 5 days timeout, but I really doubt anyone > expects an idle TCP flow to stay 'alive' when nothing is sent for 5 > days. So would 37hrs ~= 1.5 days be a reasonable cutoff or will stuff fall apart and people be surprised? Thanks, tglx