From owner-freebsd-current@FreeBSD.ORG Wed Sep 29 10:41:15 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C0C2E106564A for ; Wed, 29 Sep 2010 10:41:15 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-bw0-f54.google.com (mail-bw0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id 490F08FC24 for ; Wed, 29 Sep 2010 10:41:14 +0000 (UTC) Received: by bwz15 with SMTP id 15so538101bwz.13 for ; Wed, 29 Sep 2010 03:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :x-enigmail-version:content-type:content-transfer-encoding; bh=4fexJy8d3gtW1AYTs8snsLCslHiDYJILiGWRO3voDf0=; b=lSLf6V1pgdafFTusvpAhEFxj1KiXCDMVfVkKFtjC79YYLk/73V5ps6BFVShe0qkRcj pXe2M70EsJNeY58Mtk131q9nYdWlIGXLVX/ab92nY8rBH+lNtZbwg6semmVmsp1uywQ4 Iio6FLysAmK4vvtU8+xUci8JkNNzVX6nkB9zI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=kNvmCxRTzrV8O6gS/tGkEut69AID9tASjux4mTpgTsGHKS4g9r8nS5LwU6lhnmzcZz LuzD42vZzAdBHJ3K8rtVcVi8ftjwghqVduzwOdv2G8/E7jW9wZf2J34LYXJRRWfpwePg bc6DwXcplOOujTAIhc5zBBAZqoXveMvUe6NkA= Received: by 10.204.54.196 with SMTP id r4mr52790bkg.5.1285756873620; Wed, 29 Sep 2010 03:41:13 -0700 (PDT) Received: from mavbook2.mavhome.dp.ua (pc.mavhome.dp.ua [212.86.226.226]) by mx.google.com with ESMTPS id d27sm6541736bku.22.2010.09.29.03.41.11 (version=SSLv3 cipher=RC4-MD5); Wed, 29 Sep 2010 03:41:12 -0700 (PDT) Sender: Alexander Motin Message-ID: <4CA317BA.8070903@FreeBSD.org> Date: Wed, 29 Sep 2010 13:40:58 +0300 From: Alexander Motin User-Agent: Thunderbird 2.0.0.23 (X11/20091212) MIME-Version: 1.0 To: David Naylor References: <201009291207.53146.naylor.b.david@gmail.com> In-Reply-To: <201009291207.53146.naylor.b.david@gmail.com> X-Enigmail-Version: 0.96.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "freebsd-current@freebsd.org" Subject: Re: Safe-mode on amd64 broken X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Wed, 29 Sep 2010 10:41:15 -0000 Hi. David Naylor wrote: > Trying to boot a recent (sep 23) amd64 kernel in safe-mode fails with ``panic: > No usable event timer found!''. This occurs on two (all my) machines. This > has been a persistent problem since the introduction of the event timer code. I've reproduced the problem. The reason is that all (or at least most) of devices (both PCI and ISA), including only available in that mode i8254 and RTC timers, failed to allocate their interrupts. While reported message is indeed related to event timer code, problem IMHO doesn't. While without this panic system could boot without any alive timer, I have doubts that it would be functional without timers, USB, network and disk controllers. Problems seems to be the same if I am trying to boot without ACPI. -- Alexander Motin