Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756306AbYFZH11 (ORCPT ); Thu, 26 Jun 2008 03:27:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752978AbYFZH1T (ORCPT ); Thu, 26 Jun 2008 03:27:19 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:59297 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753323AbYFZH1S (ORCPT ); Thu, 26 Jun 2008 03:27:18 -0400 Date: Thu, 26 Jun 2008 09:22:39 +0200 From: Ingo Molnar To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, josh@freedesktop.org, dvhltc@us.ibm.com, niv@us.ibm.com, dino@in.ibm.com, akpm@linux-foundation.org, torvalds@linux-foundation.org, vegard.nossum@gmail.com, adobriyan@gmail.com, oleg@tv-sign.ru, bunk@kernel.org, rjw@sisk.pl Subject: Re: [PATCH -tip-rcu] Make rcutorture more vicious: invoke RCU readers from irq handlers (timers) Message-ID: <20080626072239.GB3160@elte.hu> References: <20080618122144.GA27143@linux.vnet.ibm.com> <20080618162649.GA18326@linux.vnet.ibm.com> <20080622200638.GA25328@linux.vnet.ibm.com> <20080625192452.GA12754@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080625192452.GA12754@linux.vnet.ibm.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1056 Lines: 26 * Paul E. McKenney wrote: > This patch allows torturing RCU from irq handlers (timers, in this > case). A new module parameter irqreader enables such additional > torturing, and is enabled by default. Variants of RCU that do not > tolerate readers being called from irq handlers (e.g., SRCU) ignore > irqreader. > > (No failures observed, but only short tests thus far. And no failures > observed thus far from about 10 hours of running stock rcutorture in > parallel with 170 kernel builds on a two-CPU machine.) applied to tip/core/rcu - thanks Paul. > +static int irqreader = 1; /* RCU readers from irq (timers). */ Good - this means that in bzImage type of tests (built-in rcutorture, no modules) this new test variant will be activated by default, right? Ingo -- 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/