From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753535AbbJPFmm (ORCPT ); Fri, 16 Oct 2015 01:42:42 -0400 Received: from phil.doycomm.com ([66.219.128.249]:37005 "EHLO phil.doycomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753502AbbJPFmk (ORCPT ); Fri, 16 Oct 2015 01:42:40 -0400 Subject: Re: [PATCH/RFT 0/2] regression fix: "smpboot: do_boot_cpu failed(-1) to wakeup CPU#1" From: Donald Parsons To: Len Brown Cc: x86@kernel.org, shrybman@teksavvy.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <1444968869-21435-1-git-send-email-lenb@kernel.org> References: <1444968869-21435-1-git-send-email-lenb@kernel.org> Content-Type: text/plain; charset="us-ascii" Date: Fri, 16 Oct 2015 01:42:26 -0400 Message-ID: <1444974146.5774.8.camel@falcon.homelinux.org> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-1.fc14) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2015-10-16 at 00:14 -0400, Len Brown wrote: > Shane, Donald, > Please test this pair of patches. > > If the default kernel still has a problem booting CPU #1 on your Core2 system, > "cpu_init_udelay=10000" should get you back to the legacy delays. Applied patches to Linus' 4.3-rc4 (with none of our recently discussed changes.) Result missing CPU is back! I also tried the "cpu_init_udelay=1" with rc5 and that also gave me back the missing CPU? Previously I had tried "cpu_init_udelay=10000" and it did not get missing CPU back (with rc3 or rc4). I can do more testing if you need it. Thanks, Don