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=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 384F6C4CEC9 for ; Wed, 18 Sep 2019 15:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 09D96207FC for ; Wed, 18 Sep 2019 15:58:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="l0A2z1TL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731808AbfIRP62 (ORCPT ); Wed, 18 Sep 2019 11:58:28 -0400 Received: from mail-pg1-f171.google.com ([209.85.215.171]:41779 "EHLO mail-pg1-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727152AbfIRP61 (ORCPT ); Wed, 18 Sep 2019 11:58:27 -0400 Received: by mail-pg1-f171.google.com with SMTP id x15so82395pgg.8 for ; Wed, 18 Sep 2019 08:58:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=kuawgKYd1ZO4hmm7LLtvr0pa9no04t6i2+r3+Gwk4x4=; b=l0A2z1TLXgxmmedq5++QkoO8DwxSNyr+T1b6Mzqo0NATMUz3eiscRJLFqMoH5KhzsJ u9dyUkO3k2ighuZYzJxywBe/eWWl+32r/Y/l+o07U5SrYgIhkRDUpBWizrmYf44rKcfW frSb0JL/ygJ++bYP1sXMh+kpZRLdaeaqOrdI/M65JpZNmgd9wbmzHPmBIC0V679HJwXz zZL+y8vQ7/5QoUQ2EDFCOE62C2B+/gjgcUkTmQf3ZgRU5FPX+w/SU4hPNN6uVQoPWNaW gtI/dqGgHOiAXMdvt69Mabmhz8JVgNf/eLcM/b6HFkLdmo2+vmk9W/ZG8OCgkoLXgZhR n9XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=kuawgKYd1ZO4hmm7LLtvr0pa9no04t6i2+r3+Gwk4x4=; b=A47R2yM8R/h/cNPAPxGFp1Op+mjdLfbB6XU7MuY6VfEnawMOH4YqTk63X7+Ms0EpAQ E595yGnbZFuIZ/qm4P5RKt5MAU5gmYzQGj8LjYHVCQszf9qIsNXIvVGEIxFHmcPWSMDI nRbtRCewG+fKpgH17t0b5eaR9fN/B+txmMVoKbJ8WRrSS1834ZN4zwjBBDfG97+ew+aW +ive4Jr50IVUmVjITRuZkvpHt4AMe/+GeWWdHp2EZjygNKA5k6IwxwXnSTOc/0WnAifW Zsxf69mc0UFtK+3RZWoYs5i7ryl1WlXV+EDCU7T0tDD9b8PglLIGM5sKQMChinfcoXVD mWWA== X-Gm-Message-State: APjAAAUzH+ACXGHdtdJ8njxQ0rQ8DIpA5viAO071rFunysB8+cl4BmhO JS1XZ2KVXvzaoB9P11y+Hm0= X-Google-Smtp-Source: APXvYqwl+D35M1mGQ5CVkx5D9cM30xhSLxrYJ8pZoQLGMu0DhVC153jK58vKQJWknJASA2CRgx/Sjw== X-Received: by 2002:a17:90a:c24e:: with SMTP id d14mr4793076pjx.0.1568822306830; Wed, 18 Sep 2019 08:58:26 -0700 (PDT) Received: from localhost ([121.137.63.184]) by smtp.gmail.com with ESMTPSA id m24sm5190036pgj.71.2019.09.18.08.58.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Sep 2019 08:58:25 -0700 (PDT) From: Sergey Senozhatsky X-Google-Original-From: Sergey Senozhatsky Date: Thu, 19 Sep 2019 00:58:23 +0900 To: Sergey Senozhatsky Cc: Qian Cai , Steven Rostedt , Petr Mladek , Catalin Marinas , Will Deacon , Dan Williams , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Peter Zijlstra , Waiman Long , Thomas Gleixner , Theodore Ts'o , Arnd Bergmann , Greg Kroah-Hartman Subject: Re: printk() + memory offline deadlock (WAS Re: page_alloc.shuffle=1 + CONFIG_PROVE_LOCKING=y = arm64 hang) Message-ID: <20190918155823.GB158834@tigerII.localdomain> References: <1566509603.5576.10.camel@lca.pw> <1567717680.5576.104.camel@lca.pw> <1568128954.5576.129.camel@lca.pw> <20190911011008.GA4420@jagdpanzerIV> <1568289941.5576.140.camel@lca.pw> <20190916104239.124fc2e5@gandalf.local.home> <1568817579.5576.172.camel@lca.pw> <20190918155059.GA158834@tigerII.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190918155059.GA158834@tigerII.localdomain> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A correction: On (09/19/19 00:51), Sergey Senozhatsky wrote: [..] > > zone->lock --> console_sem->lock > > So then we have > > zone->lock --> console_sem->lock --> pi_lock --> rq->lock > > vs. the reverse chain > > rq->lock --> console_sem->lock ^^^ zone->lock -ss