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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 683D2C43441 for ; Sun, 11 Nov 2018 13:08:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3189320871 for ; Sun, 11 Nov 2018 13:08:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3189320871 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=tkos.co.il Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728044AbeKKW53 (ORCPT ); Sun, 11 Nov 2018 17:57:29 -0500 Received: from guitar.tcltek.co.il ([192.115.133.116]:47961 "EHLO mx.tkos.co.il" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727510AbeKKW53 (ORCPT ); Sun, 11 Nov 2018 17:57:29 -0500 Received: from tarshish (unknown [10.0.8.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx.tkos.co.il (Postfix) with ESMTPS id 1F5C6440205; Sun, 11 Nov 2018 15:08:54 +0200 (IST) References: <20181109121112.xibwnc354wzsbovl@bars> User-agent: mu4e 1.0; emacs 25.2.2 From: Baruch Siach To: Sergey Matyukevich , Gregory CLEMENT Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [bug report] armada-8040-mcbin: 4.20-rc1 boot failure In-reply-to: <20181109121112.xibwnc354wzsbovl@bars> Date: Sun, 11 Nov 2018 15:08:53 +0200 Message-ID: <877ehj7od6.fsf@tkos.co.il> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Sergey, Gregory, Sergey Matyukevich writes: > MacchiatoBin board fails to boot v4.20-rc1 kernel built using arm64 > defconfig. According to quick bisection of the board dts file, the > root cause is in dts patch enabling CPU deep idle states: > see 8ed46368776b3bc. Is there any pending fix other than reverting > deep idle state support ? I reproduced the same boot failure on the Armada 8K based Clearfog GT-8K. Revert of commit 8ed46368776b3bc on top of v4.20-rc1 makes the system boot again. Here is the splat I get: [ 87.358425] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 87.364556] rcu: 3-...!: (1 ticks this GP) idle=d04/0/0x0 softirq=79/79 fqs=1 [ 87.371897] rcu: (detected by 2, t=21490 jiffies, g=-1035, q=179) [ 87.378106] Task dump for CPU 3: [ 87.381347] swapper/3 R running task 0 0 1 0x00000028 [ 87.388428] Call trace: [ 87.390892] __switch_to+0x78/0xb4 [ 87.394310] arm_enter_idle_state+0x38/0x4c [ 87.398512] cpuidle_enter_state+0xc8/0x15c [ 87.402713] cpuidle_enter+0x18/0x20 [ 87.406304] call_cpuidle+0x30/0x34 [ 87.409807] do_idle+0x19c/0x224 [ 87.413048] cpu_startup_entry+0x20/0x24 [ 87.416988] secondary_start_kernel+0x158/0x168 baruch -- http://baruch.siach.name/blog/ ~. .~ Tk Open Systems =}------------------------------------------------ooO--U--Ooo------------{= - baruch@tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -