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 1JwMp4-0000Pq-2b for user-mode-linux-devel@lists.sourceforge.net; Wed, 14 May 2008 12:39:34 -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 1JwMp1-000653-7p for user-mode-linux-devel@lists.sourceforge.net; Wed, 14 May 2008 12:39:34 -0700 Date: Wed, 14 May 2008 15:39:12 -0400 From: Jeff Dike Message-ID: <20080514193912.GA11531@c2.user-mode-linux.org> References: <20080502163020.GB7843@c2.user-mode-linux.org> <87bq3o5yeo.fsf@hades.wkstn.nix> <20080502195720.GB10369@c2.user-mode-linux.org> <87k5ic47is.fsf@hades.wkstn.nix> <20080503005631.GA12599@c2.user-mode-linux.org> <877ieb4s4n.fsf@hades.wkstn.nix> <20080509151604.GC10169@c2.user-mode-linux.org> <1210353202.31648.8.camel@localhost> <20080514172347.GA10283@c2.user-mode-linux.org> <1210789757.25724.3.camel@localhost> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1210789757.25724.3.camel@localhost> Subject: Re: [uml-devel] actually useful backtrace from a CPU-chewing hang 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: vincent-perrier Cc: Nix , user-mode-linux-devel@lists.sourceforge.net I finally reproduced this using 2.6.25.1 (2.6.25-mm1 was no good) with your config. The patch below fixes it for me. You'll notice a certain similarity between this and a previous patch that you posted. It's not clear to me why yours didn't work. Jeff -- Work email - jdike at linux dot intel dot com Index: 2.6/stable/arch/um/os-Linux/time.c =================================================================== --- 2.6.orig/stable/arch/um/os-Linux/time.c 2008-05-14 14:55:56.000000000 -0400 +++ 2.6/stable/arch/um/os-Linux/time.c 2008-05-14 15:30:48.000000000 -0400 @@ -66,12 +66,21 @@ long long disable_timer(void) return timeval_to_ns(&time.it_value); } +static long long last_time; + long long os_nsecs(void) { struct timeval tv; + long long ret; gettimeofday(&tv, NULL); - return timeval_to_ns(&tv); + ret = timeval_to_ns(&tv); + + if((last_time != 0) && (last_time > ret)) + ret = last_time; + + last_time = ret; + return ret; } #ifdef UML_CONFIG_NO_HZ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel