Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp3541746imm; Wed, 5 Sep 2018 01:44:19 -0700 (PDT) X-Google-Smtp-Source: ANB0VdbZ/HKZPRura7PMscOMeSAK1tRIA8/KTweEWK3bfErvha2VUlpk8yWLGVoATWsY0afkxZxo X-Received: by 2002:a65:6143:: with SMTP id o3-v6mr36168518pgv.52.1536137059876; Wed, 05 Sep 2018 01:44:19 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1536137059; cv=none; d=google.com; s=arc-20160816; b=JrfH/zc6F21yr/+9Qq/WPX4pbsKfSlpi1dq5ibHHCh9/Bwoqz3B/INSLyfncP6V+Ms H6q/xSF22j+I1BtVPQPJuLkXSRvDjr5VrsfRe2MImSbct6DkgfasP4CzylVCFsdvetDP KWc34AQTDE1IneEpt/9FSHdcnyURmgQvKlhyfXI8WwTSH8QNT13npoTKoL69LPFTmQGS 0pY8U2ir51b3bk7m1WgO4n5izIga8LH9t5y77hEQZmw+9mTTtH1ljrZiGOQmTPc0KzN5 lxcT0v7AoMC1HKEk7bMsZWuV655lctQK+RScMux49LXLgvTrx8UIIChdcoRKQWGpMgNp ZQrg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=RZCPPZOG8Tu/iUvLbuiol+k/5ywiIvn77e7rVkj2gvQ=; b=OdRfN/ysRo/9x81+sva+rClv/wTWk9s71CE5Mp44yo7PF45xr+lE33pgDW6ssdl3+/ reJ9bAdkWPIcq+wRNHPfSU25RPpyZVlMjvjKjvO8sfExzClIzreMKMF4hW7SXtWVtN96 N65S0ABjEXVq9XrbNhz+XzLyf33aGMERFGneJMFTAKIWXiM3Cdzzwei2Hj4nKM7ygQwC XZJJSYLJX+jwIfyXbjyZ2fceMoHjrsVzCrdJnP6zIa4lkfiEDN1euN4fqfpQJHzcZ3xl ib39DtpPL7XXNqSx6ySsLByGybtX6RinJ8rbr/jE7rPN5oayrYN+d0e3nJx41bwgHT/K Yyng== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=nuiWeZ5b; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id y18-v6si1470095pfb.161.2018.09.05.01.44.04; Wed, 05 Sep 2018 01:44:19 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=nuiWeZ5b; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727991AbeIENLx (ORCPT + 99 others); Wed, 5 Sep 2018 09:11:53 -0400 Received: from merlin.infradead.org ([205.233.59.134]:58320 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726401AbeIENLx (ORCPT ); Wed, 5 Sep 2018 09:11:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding: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=RZCPPZOG8Tu/iUvLbuiol+k/5ywiIvn77e7rVkj2gvQ=; b=nuiWeZ5btwOeNG5cYQ8s+qes0 2w4bcdZeDU+sP1g/9PwmrlB/Go3JPpyuDIeyNw7wu0XKUUCF3P1jXmpHEzRm4lZkQHg5sYA+P4GBo pV+x+VmPpb3lAOfzoXTrQN+vktdE6tendsbaM7K5x7iTUwwGDQ7vWnItODbbsjtj/7D9fjlNn4VTK 8O9e5jXXOulG2SB6tvui9+ldpBx695jeVb9mcWu4TmLexXv7oi0mY1KzygQefRESY29ev6QwG1V+A AUpUK0DVD/zEmTdjXQYwpdjeZzVWY69I8Az00H5JLXP4Ta+emddlYlsf1g57aCbg/ppyJAcAlHFS8 79qxHJAiQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fxTOc-00040C-UQ; Wed, 05 Sep 2018 08:42:43 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id A420A20191BFF; Wed, 5 Sep 2018 10:42:41 +0200 (CEST) Date: Wed, 5 Sep 2018 10:42:41 +0200 From: Peter Zijlstra To: Niklas Cassel Cc: linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org Subject: Re: stop_machine() soft lockup Message-ID: <20180905084241.GS24082@hirez.programming.kicks-ass.net> References: <20180904190322.GA21835@centauri.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180904190322.GA21835@centauri.lan> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 04, 2018 at 09:03:22PM +0200, Niklas Cassel wrote: > Hello Peter, > > I'm seeing some lockups when booting linux-next on a db820c arm64 board. > I've tried to analyze, but I'm currently stuck. Please see (should be in your Inbox too): https://lkml.kernel.org/r/20180905084158.GR24124@hirez.programming.kicks-ass.net