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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1C73DC79FB9 for ; Thu, 10 Sep 2026 08:54:26 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4hgWh01y3Qz2yFK; Thu, 10 Sep 2026 18:54:24 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2a07:de40:b251:101:10:150:64:2" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1789030464; cv=none; b=gR5FwzgOdN2C3LeKR0iRjUfM8lOOBdF4q5ktk2+h78Ja/zGFgIs4PS8iGt2GO6EWcxOODGjr6qBzbjUSnl8XLUWYtd0iEX9thfD3muS6ai+/dh4RSshcHvxGso3DDs1aksVF7p+ucV4JXK5rNl/+0Odct+aaww+F4aFIyIwQFD/c3HJdqbgwqNPj3ZZ8v3DUiCDVHQkYNep4B+bcJhH1UJR/Ttmi1dDDZ2s7y6tJ4aVnRzp8F2koJEQPusEHS9u8FRDFcqYKSKLITCLMTyYgyAZNYIIw8JMgNaCS4ipVAzqK9C/jYRFdg02LXK9np1j+82DjhpmFzL9Aa73gWKDP+A== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1789030464; c=relaxed/relaxed; bh=UeffumlS8Gx39HedsU6NbWjsw3Z0Arhj3Egvzx+VirQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QqvQahZF0hmiu+gyp+a3yteh64OfTf6WuT9AMG25Ldk3nBPl7EYmkZ2Z7uWJUozDRcY2Nxa8w2VGXgzxTLzMnBv6uhHZVnW6qEaohQg2GWxdMkZSa8oddVtQo2iF6/s7yH+p54syPWcD7U4shiCKqVKKDF1XYTKi6s0BNkESjvsWkihqiTqTjXKJb5U/Mw7ysQGPdXZmPYj/dZ2ZTOi95jpBlv8zsGq3lSg+8tehFgeefwyDgoiPxa3MvEYb1urg12vrNA9NBlw7X1Mcdgq3aegmgnoVlRMTVxMu3BhK4++4ti3Up+DxET8vIvTI3ul1uqeM3e3bT2vbnTU5qE3Bww== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=suse.de; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=AN+iMCxr; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=7XmOIgAV; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=xGZ4hwSY; dkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=MjMZ7yta; dkim-atps=neutral; spf=pass (client-ip=2a07:de40:b251:101:10:150:64:2; helo=smtp-out2.suse.de; envelope-from=msuchanek@suse.de; receiver=lists.ozlabs.org) smtp.mailfrom=suse.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=AN+iMCxr; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=7XmOIgAV; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=xGZ4hwSY; dkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=MjMZ7yta; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=suse.de (client-ip=2a07:de40:b251:101:10:150:64:2; helo=smtp-out2.suse.de; envelope-from=msuchanek@suse.de; receiver=lists.ozlabs.org) Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4hgWgx6f9Rz2y2L for ; Thu, 10 Sep 2026 18:54:21 +1000 (AEST) Received: from kunlun.suse.cz (unknown [IPv6:2a07:de40:b306:2000::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 4A2041FDA6; Thu, 10 Sep 2026 08:54:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1789030452; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UeffumlS8Gx39HedsU6NbWjsw3Z0Arhj3Egvzx+VirQ=; b=AN+iMCxrAIzvQN49JwsW67p0dKYGSNClJKgBQPWwH0zZBtAX2cjF9hAh6+puSldaE2fWxV 89L+8XAN7j7shGrRtiI5Tft9uNNToF2ftML0IM6DILOVxtCk0CHlbuO6jHiQIE7jngslwX tZ7oj4k609vENgGjxi3oco6vKW3ZDLE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1789030452; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UeffumlS8Gx39HedsU6NbWjsw3Z0Arhj3Egvzx+VirQ=; b=7XmOIgAVv6o0u4StfQjvb8xuT4kadN9xzzyxI5srnyun6ASKu5YJ8kmHqrCHxlKjUnpgRK rfmtlJhLo1GNmLCg== Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=xGZ4hwSY; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=MjMZ7yta DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1789030448; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UeffumlS8Gx39HedsU6NbWjsw3Z0Arhj3Egvzx+VirQ=; b=xGZ4hwSYpLJyVvxpYYSA3SyH4sT1xuZrpyt43GvpO+Hrf5XMK0fT42CKZpFVSWJIxPlzDH MHIGpfwzt9uKN48GzBnbOOLhLWEd/+UNN7qZ0r0yomWrxpe6HBmlR52tkYMHQpetOGIDFR F3N35+7ww7TU/71Ree9gCcCobkMa5Dw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1789030448; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UeffumlS8Gx39HedsU6NbWjsw3Z0Arhj3Egvzx+VirQ=; b=MjMZ7ytaQZdCx0uuP43DtPK1EHkR2EsheOUWHRPY/ZQh9ZVjFhKFOjfMHYpL0p03dW2dCv tY+nIUtmUcge7mDw== Date: Thu, 10 Sep 2026 10:54:07 +0200 From: Michal =?iso-8859-1?Q?Such=E1nek?= To: Christian Zigotzky Cc: Shrikanth Hegde , Christophe Leroy , linuxppc-dev , kvm-ppc@vger.kernel.org, Madhavan Srinivasan , Peter Zijlstra , "R.T.Dickinson" , hypexed@yahoo.com.au, mad skateman , Christian Zigotzky Subject: Re: [Linux PPC] Disable PREEMPT Message-ID: References: <1D6F66F5-E181-4814-A7E5-E52A678D37A2@xenosoft.de> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1D6F66F5-E181-4814-A7E5-E52A678D37A2@xenosoft.de> X-Spamd-Bar: ++++++++++++ X-Rspamd-Queue-Id: 4A2041FDA6 X-Rspamd-Action: add header X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spamd-Result: default: False [12.74 / 50.00]; SPAM_FLAG(5.00)[]; NEURAL_SPAM_LONG(3.50)[1.000]; BAYES_HAM(-3.00)[99.99%]; HFILTER_HOSTNAME_UNKNOWN(2.50)[]; RDNS_NONE(2.00)[]; ONCE_RECEIVED(1.20)[]; HFILTER_HELO_IP_A(1.00)[kunlun.suse.cz]; R_MIXED_CHARSET(0.63)[subject]; HFILTER_HELO_NORES_A_OR_MX(0.30)[kunlun.suse.cz]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_SHORT(-0.08)[-0.389]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; FREEMAIL_ENVRCPT(0.00)[xtra.co.nz,yahoo.com.au,gmail.com]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[linux.ibm.com,kernel.org,lists.ozlabs.org,vger.kernel.org,infradead.org,xtra.co.nz,yahoo.com.au,gmail.com,xenosoft.de]; DNSWL_BLOCKED(0.00)[2a07:de40:b306:2000::2:from]; RCVD_COUNT_ZERO(0.00)[0]; RCPT_COUNT_SEVEN(0.00)[11]; MISSING_XM_UA(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email] X-Spam: Yes On Mon, Sep 07, 2026 at 01:32:18PM +0200, Christian Zigotzky wrote: > On 07 September 2026 at 10:51 am, Michal Suchánek wrote: > > There is the obvious question which I did not notice answered in this > thread: Did you set up sysrq and/or kdump and find out where the kernel > is stuck? > > Thanks > > Michal > > - - - > > I think I need kexec for kdump due to the system freezing after activating of KVM HV. Unfortunately kexec doesn’t work on my machines. > > Further information: https://github.com/chzigotzky/kernels/releases/tag/Kexec So there is some bug with kexec initialization on your platform. Sysrg for dumping stacks to console might still work. Thanks Michal