From owner-freebsd-current@FreeBSD.ORG Mon Apr 8 04:52:39 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 55FDBF05 for ; Mon, 8 Apr 2013 04:52:39 +0000 (UTC) (envelope-from jdc@koitsu.org) Received: from qmta13.emeryville.ca.mail.comcast.net (qmta13.emeryville.ca.mail.comcast.net [IPv6:2001:558:fe2d:44:76:96:27:243]) by mx1.freebsd.org (Postfix) with ESMTP id 3F188B9 for ; Mon, 8 Apr 2013 04:52:39 +0000 (UTC) Received: from omta14.emeryville.ca.mail.comcast.net ([76.96.30.60]) by qmta13.emeryville.ca.mail.comcast.net with comcast id MGlh1l0051HpZEsADGse2w; Mon, 08 Apr 2013 04:52:38 +0000 Received: from koitsu.strangled.net ([67.180.84.87]) by omta14.emeryville.ca.mail.comcast.net with comcast id MGsd1l00D1t3BNj8aGseyZ; Mon, 08 Apr 2013 04:52:38 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id D971473A1B; Sun, 7 Apr 2013 21:52:37 -0700 (PDT) Date: Sun, 7 Apr 2013 21:52:37 -0700 From: Jeremy Chadwick To: lev@FreeBSD.org Subject: Re: Kernel output interleaved on boot Message-ID: <20130408045237.GA70548@icarus.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1365396758; bh=IILh7wLGlcNrUx1DmHpvQnB/C2xUnqnK1tOxMj20+c0=; h=Received:Received:Received:Date:From:To:Subject:Message-ID: MIME-Version:Content-Type; b=MZpBXe5CWUOF1pCfTKMQVFRyELnCaPfX44NszwbSf1nc5MQOZOhvAg2rLgc+3X5bf TUwRyyJecyYTBMvkeca0FMJ8CTbVXY9t2uHoCfoKRVSWRqoQwp2HWgCT1N/sLiAMA3 N4EjP3BtwKAkNPHAyDU9RFCaxZ1Zv1RSOhqpOTpexolCoL2CY7G8X7E5gscDdb2DhS 8fduC2MPDKc676RT7M7bze1lRi6pJ+zi3YmGacvz0If0tlnjxyTXz6TtXiM9LowAfp g+L0449iHA5CSYEZDdg2h6wpgIK5Ah9+7C6EGKqdJYgCx1WXMVmRcF05OPsGxzq01Q BNkR5QF9Hp5Vw== X-Mailman-Approved-At: Mon, 08 Apr 2013 16:10:48 +0000 Cc: freebsd-current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Apr 2013 04:52:39 -0000 I have discussed this problem for years now -- over 5 years, to be exact. As if I haven't sounded like a broken record before, I surely do now. Start here, under section "Kernel", item "Scrambled or garbled kernel output": https://wiki.freebsd.org/BugBusting/Commonly_reported_issues The problem has not gone away. It has not been solved. It has not been worked around. PRINTF_BUFR_SIZE does not solve the problem, and rarely helps relieve it. I have discussed this issue more recently (2010) with John Baldwin as well: http://lists.freebsd.org/pipermail/freebsd-questions/2010-March/214412.html http://lists.freebsd.org/pipermail/freebsd-questions/2010-March/214423.html And in December 2011 too -- particularly an important read if you think increasing the number is a wise idea: http://lists.freebsd.org/pipermail/freebsd-stable/2011-December/065158.html Bottom line: there is no solution other than to switch OSes. And yes, I am aware of how GSoC works, but this really should have become a GSoC project by now, otherwise the Foundation should have funded someone to fix this. It makes kernel debugging basically worthless. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |