From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750899AbcAZSeR (ORCPT ); Tue, 26 Jan 2016 13:34:17 -0500 Received: from resqmta-ch2-11v.sys.comcast.net ([69.252.207.43]:48154 "EHLO resqmta-ch2-11v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965404AbcAZSeL (ORCPT ); Tue, 26 Jan 2016 13:34:11 -0500 Date: Tue, 26 Jan 2016 12:34:10 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@east.gentwo.org To: Mike Galbraith cc: Michal Hocko , Peter Zijlstra , LKML Subject: Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle) In-Reply-To: <1453833078.3534.59.camel@gmail.com> Message-ID: References: <20160121165148.GF29520@dhcp22.suse.cz> <20160122140418.GB19465@dhcp22.suse.cz> <20160122161201.GC19465@dhcp22.suse.cz> <1453566115.3529.8.camel@gmail.com> <20160125174224.GH23934@dhcp22.suse.cz> <20160125201319.GA19020@dhcp22.suse.cz> <1453833078.3534.59.camel@gmail.com> Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 26 Jan 2016, Mike Galbraith wrote: > I disagree. You're burning electrons for no benefit at all to me on my > box. You want to do high speed trading, that's fine, but I expect my > box to be able to pop in and out of idle without having to pay a toll > to the high speed trading bandits of the world, thank you very much. > > This specialty thing does not belong in the generic fast path. The system going idle is a fastpath. Mind boogling.