Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269531AbUICB2N (ORCPT ); Thu, 2 Sep 2004 21:28:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269497AbUICBYs (ORCPT ); Thu, 2 Sep 2004 21:24:48 -0400 Received: from rwcrmhc13.comcast.net ([204.127.198.39]:2441 "EHLO rwcrmhc13.comcast.net") by vger.kernel.org with ESMTP id S269522AbUICBW1 (ORCPT ); Thu, 2 Sep 2004 21:22:27 -0400 Subject: Re: [RFC&PATCH] Alternative RCU implementation From: Jim Houston Reply-To: jim.houston@comcast.net To: Manfred Spraul Cc: paulmck@us.ibm.com, linux-kernel@vger.kernel.org, Dipankar Sarma , Andrew Morton , William Lee Irwin III , Jack Steiner , Jesse Barnes , rusty@rustcorp.com.au In-Reply-To: <41378EB9.2060508@colorfullife.com> References: <20040830004322.GA2060@us.ibm.com> <1093886020.984.238.camel@new.localdomain> <20040830185223.GF1243@us.ibm.com> <1093922569.1003.159.camel@new.localdomain> <20040901035350.GH1241@us.ibm.com> <1094043719.986.51.camel@new.localdomain> <20040902163854.GC1258@us.ibm.com> <1094151272.985.103.camel@new.localdomain> <41378EB9.2060508@colorfullife.com> Content-Type: text/plain Organization: Message-Id: <1094174357.985.169.camel@new.localdomain> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 02 Sep 2004 21:19:17 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 998 Lines: 28 On Thu, 2004-09-02 at 17:20, Manfred Spraul wrote: > Jim Houston wrote: > > >We add the following /proc files: > >/proc/shield/ltmrs > > Setting a bit limits the use of local timers on the > > corresponding cpu. > > > How do you handle schedule_delayed_work_on()? > slab uses it to drain the per-cpu caches. It's not fatal if a cpu > doesn't drain it's caches (just some wasted memory), but it should be > documented. Hi Manfred, The timer shielding migrates most of the timers to non-shielded cpus but does keep track of timers queued with add_timer_on(). These are polled periodically from a non-shielded cpu, and an inter-processsor interrupt is used to force the shielded cpu to handle their expiry. Jim Houston - Concurrent Computer Corp. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/