From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CC87C43381 for ; Fri, 15 Mar 2019 12:15:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA40721871 for ; Fri, 15 Mar 2019 12:15:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="mY+Wld5f" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728982AbfCOMPp (ORCPT ); Fri, 15 Mar 2019 08:15:45 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:55992 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728934AbfCOMPp (ORCPT ); Fri, 15 Mar 2019 08:15:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Transfer-Encoding :Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ZsM3UBWajgyMamixPtpjgFQzUMJGGE2hq6RgCGdr5hw=; b=mY+Wld5f4v6nZzZzxKHxmhYCen i/7K2l1CGUtCX4a6oIS+c1QeJ1hGznbStjmyaKMf0sfGFAzZ81OQ37wezTX+LXJRyaQrpzfiOwtvB es5k5aeSYnRAQDk81m4NUTN0cGkPq72MzjMIB7FBnIcvYSB3HjC+W+EFdaeoZuRvLD4bMclqh3PJQ zuFPKyh9SlLcjFuLrivgb6/mAW3kt0Lx8uStuWQS4xnM/o/+6cZUmSXfQObWVSNBxR0PzkYbflGAD 94ZXB0FVw/bUxKs3pcquZy7W3r+UrwkVgem+Pa60sHmPRwHzUDgnHmTnU68jSe0v8QBe23ieB3x42 iMMhzt1A==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1h4lkV-00024r-KK; Fri, 15 Mar 2019 12:15:43 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 11B0B21419E57; Fri, 15 Mar 2019 13:15:41 +0100 (CET) Date: Fri, 15 Mar 2019 13:15:41 +0100 From: Peter Zijlstra To: Thomas =?iso-8859-1?Q?M=FCller?= Cc: linux-kernel@vger.kernel.org Subject: Re: disabling secondary CPU hangs / system fails to suspend with kernel 4.19+ Message-ID: <20190315121541.GD6058@hirez.programming.kicks-ass.net> References: <5c48095e-028a-404f-aaa1-964f83c83817@mathtm.de> <20190315090950.GT5996@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 15, 2019 at 12:41:00PM +0100, Thomas Müller wrote: > > What .config do you have? > The one packaged by Fedora. I've attached the one for 4.20.15 as reference. Thanks, I'll have a poke, see what, if anything, is different from the kernels I ran. > > And what, if anything do you see on the > > console when it goes funny? > Nothing unfortunately. > When trying to suspend the display immediately goes blank, the system becomes unresponsive and the > status LED within the power button start flashing rapidly (just like it does when the power cord is > attached). > > > > I think you wrote that hot-un-plug never completes? Is there anything in > > dmesg when it's stuck in: > > > > echo 0 > /sys/devices/system/cpu/cpu1/online > > > > ? > I've just tried that again and the system immediately froze. Hmm, I tought you said the system remained semi usable, just that reboot stopped working thereafter and it needed a power cycle. > `journalctl -f` was running in a second window but it had no chance to output anything... :/ Ah, you're using a GUI! Stop doing that ;-) See if you can use the VGA console; not a FB console or a DRM console, but the real ancient, proper text mode, VGA console. Now, don't ask me how to do that, because I don't know, I've been running on pure serial console output for the past 10 years or so, heck I don't even have systemd. And you might have to do something like: dmesg -n8, to get the console to print the kernel messages or something.