From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750923AbeEUE24 (ORCPT ); Mon, 21 May 2018 00:28:56 -0400 Received: from gherkin.frus.com ([192.158.254.49]:39846 "EHLO gherkin.frus.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750703AbeEUE2z (ORCPT ); Mon, 21 May 2018 00:28:55 -0400 Date: Sun, 20 May 2018 23:28:54 -0500 From: Bob Tracy To: linux-kernel@vger.kernel.org Subject: Re: [BUG] 4.17-rcX delays during boot and memory mapping errors Message-ID: <20180521042854.GA1147@gherkin.frus.com> References: <20180519003259.GA1114@gherkin.frus.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180519003259.GA1114@gherkin.frus.com> User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 18, 2018 at 07:32:59PM -0500, Bob Tracy wrote: > Every one of the 4.17-rcX series has hung during boot at the point where > "acpid" starts up. Beginning with -rc5, the boot actually proceeds to > completion after an "uncomfortably" long delay. > > Attempting to run the X11 server results in the following diagnostic > output in "/var/log/Xorg.0.log": v4.17-rc6 took care of the X11 server startup issue. The "uncomfortably" long delay issue persists. An observation as far as differences between 4.16 and 4.17-rc6 during startup... In v4.16 and earlier kernels, I wouldn't see the "random: crng init done" message until moments after the system was done transitioning to multi- user mode ("login" prompt on the console). In the v4.17-rcX series, I don't see a login prompt until all the events represented in the "dmesg" output below have occurred: (...) [ 7.314001] NET: Registered protocol family 10 [ 7.315781] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 7.317359] Segment Routing with IPv6 [ 8.667444] NET: Registered protocol family 17 [ 9.130872] e1000e: eth0 NIC Link is Up 10 Mbps Half Duplex, Flow Control: None [ 9.131839] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO [ 9.136947] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 78.567150] random: crng init done [ 102.974609] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready [ 102.982063] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [ 102.983716] r8152 2-1.5:1.0 eth1: carrier on (end of dmesg output) As far as what I see on the console during bootup, I see the "IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready" message, then the system "hangs" until the "random: crng init done" message appears. Then "acpid" startup and other events proceed normally. Any idea what's going on here? --Bob