From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1K3yoG-0002Mx-N2 for user-mode-linux-devel@lists.sourceforge.net; Wed, 04 Jun 2008 12:38:12 -0700 Received: from [198.99.130.12] (helo=saraswathi.solana.com) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1K3yoE-0004sM-KP for user-mode-linux-devel@lists.sourceforge.net; Wed, 04 Jun 2008 12:38:12 -0700 Date: Wed, 4 Jun 2008 15:37:15 -0400 From: Jeff Dike Message-ID: <20080604193715.GA11943@c2.user-mode-linux.org> References: <20080603190235.GA9511@c2.user-mode-linux.org> <20080603123211.e129c222.akpm@linux-foundation.org> <200806031543.56864.dhazelton@enter.net> <878wxmfg99.fsf@hades.wkstn.nix> <20080603130709.fcf6a751.akpm@linux-foundation.org> <20080603210048.GA12182@c2.user-mode-linux.org> <4846A75E.40305@goop.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4846A75E.40305@goop.org> Subject: Re: [uml-devel] [PATCH 1/6] UML - Deal with host time going backwards List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Jeremy Fitzhardinge Cc: Nix , Andrew Morton , linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, dhazelton@enter.net On Wed, Jun 04, 2008 at 03:31:58PM +0100, Jeremy Fitzhardinge wrote: > Shouldn't UML use a monotonic host clock for guest timekeeping? Indeed, Eric pointed out the posix timers, which I had forgotten about. On the face of it, a monotonic timer should do the trick, but it's not obvious how to get it to behave like a monotonic gettimeofday... Jeff -- Work email - jdike at linux dot intel dot com ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762461AbYFDTic (ORCPT ); Wed, 4 Jun 2008 15:38:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762608AbYFDTiP (ORCPT ); Wed, 4 Jun 2008 15:38:15 -0400 Received: from [198.99.130.12] ([198.99.130.12]:40774 "EHLO saraswathi.solana.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1762602AbYFDTiN (ORCPT ); Wed, 4 Jun 2008 15:38:13 -0400 Date: Wed, 4 Jun 2008 15:37:15 -0400 From: Jeff Dike To: Jeremy Fitzhardinge Cc: Andrew Morton , Nix , dhazelton@enter.net, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net Subject: Re: [PATCH 1/6] UML - Deal with host time going backwards Message-ID: <20080604193715.GA11943@c2.user-mode-linux.org> References: <20080603190235.GA9511@c2.user-mode-linux.org> <20080603123211.e129c222.akpm@linux-foundation.org> <200806031543.56864.dhazelton@enter.net> <878wxmfg99.fsf@hades.wkstn.nix> <20080603130709.fcf6a751.akpm@linux-foundation.org> <20080603210048.GA12182@c2.user-mode-linux.org> <4846A75E.40305@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4846A75E.40305@goop.org> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 04, 2008 at 03:31:58PM +0100, Jeremy Fitzhardinge wrote: > Shouldn't UML use a monotonic host clock for guest timekeeping? Indeed, Eric pointed out the posix timers, which I had forgotten about. On the face of it, a monotonic timer should do the trick, but it's not obvious how to get it to behave like a monotonic gettimeofday... Jeff -- Work email - jdike at linux dot intel dot com