Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753556AbXFYVnK (ORCPT ); Mon, 25 Jun 2007 17:43:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751563AbXFYVm6 (ORCPT ); Mon, 25 Jun 2007 17:42:58 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:42456 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751215AbXFYVm5 (ORCPT ); Mon, 25 Jun 2007 17:42:57 -0400 Date: Mon, 25 Jun 2007 23:42:46 +0200 From: Pavel Machek To: Oleg Nesterov Cc: "Paul E. McKenney" , "Rafael J. Wysocki" , Andrew Morton , Nigel Cunningham , Uli Luckas , linux-kernel@vger.kernel.org Subject: Re: synchronize_qrcu_timeout() Message-ID: <20070625214246.GC2051@elf.ucw.cz> References: <20070625104332.GA147@tv-sign.ru> <20070625145851.GB12976@linux.vnet.ibm.com> <20070625152011.GA160@tv-sign.ru> <20070625154957.GA197@tv-sign.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070625154957.GA197@tv-sign.ru> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1347 Lines: 34 On Mon 2007-06-25 19:49:57, Oleg Nesterov wrote: > On 06/25, Oleg Nesterov wrote: > > > > On 06/25, Paul E. McKenney wrote: > > > > > > On Mon, Jun 25, 2007 at 02:43:32PM +0400, Oleg Nesterov wrote: > > > > > > > > Sadly, you can't use srcu/qrcu because it doesn't handle timeouts. > > > > > > Interesting... So the thought is to have a synchronize_srcu_timeout() > > > or something similar that waited for a grace period to elapse or for > > > a timeout to expire, whichever comes first? It should not be too hard > > > to arrange something, if needed. > > > > Yes. As for qrcu (see http://marc.info/?t=116484476500001), I think it is easy. > > First, we add "int interrupted" into struct qrcu_struct, then something like this > > Even simpler, we don't need ->interrupted. > > long synchronize_qrcu_timeout(struct qrcu_struct *qp, long tout) > { > int idx, prv; Could we get less encrypted variable names? tout? Yes, I can decipher it. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/