Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751830AbdL2UMl (ORCPT ); Fri, 29 Dec 2017 15:12:41 -0500 Received: from mail-it0-f42.google.com ([209.85.214.42]:44482 "EHLO mail-it0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751304AbdL2UMj (ORCPT ); Fri, 29 Dec 2017 15:12:39 -0500 X-Google-Smtp-Source: ACJfBouS5Mgk+Q//43LwBvZfGA+zpqWfNtdRx1P9UCTApa3JT76zbawTQa1mH+Bs/tWXVFFuoGd7v9vNl8fXTsTOReg= MIME-Version: 1.0 In-Reply-To: References: From: Linus Torvalds Date: Fri, 29 Dec 2017 12:12:38 -0800 X-Google-Sender-Auth: HVOyMeKatvwJT55eXpM9SNA5zfA Message-ID: Subject: Re: 4.14.9 doesn't boot (regression) To: =?UTF-8?Q?Toralf_F=C3=B6rster?= , Andy Lutomirski Cc: stable , Linux Kernel , "the arch/x86 maintainers" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id vBTKClpo021749 Content-Length: 1000 Lines: 27 On Fri, Dec 29, 2017 at 3:14 AM, Toralf Förster wrote: > > For the server the attached .config works fine but switching from > CONFIG_GENERIC_CPU to CONFIG_MCORE2 legt them hang at boot w/op any > messages. Similar picture at the desktop. Ok, so there's another thread ("4.14.9 with CONFIG_MCORE2 fails to boot") about this same thing, but one thing to try is to see if it's just the cflags-$(CONFIG_MCORE2) += \ $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) in arch/x86/Makefile that causes this. The MCORE2 option does potentially have a few other effects (see arch/x86/Kconfig.cpu), but the first one to check might be just that compiler command line effect. So if you can edit arch/x86/Makefile, and just make that say cflags-$(CONFIG_MCORE2) += $(call cc-option,-mtune=generic) instead, and see if that makes a difference, that would narrow down the possible root cause of this problem. Linus