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=-0.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE,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 7B645C04AB4 for ; Tue, 14 May 2019 14:09:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41E2C20881 for ; Tue, 14 May 2019 14:09:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557842963; bh=09ry7hopdOyfDPB78COiiBUivUpXqZK1H6ToYb6NQCk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=MsLAj4OjFFMLXjYgnz3ASd3ju+wNdUb/zT86Kf1tS6YtiHVyV2qnCqksHQwcHd5Xr tQb9WnPhbx0Qfq44+shat7Fs6r0zELGeOaGhGkD2TpWNIQebBmJeor3fQkrUwIgRXa 1Zi/mIbTpAPTtEXK6UNCmCiR3Rbrgw/F1oJPeoJ8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726216AbfENOJW (ORCPT ); Tue, 14 May 2019 10:09:22 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:42851 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725916AbfENOJV (ORCPT ); Tue, 14 May 2019 10:09:21 -0400 Received: by mail-wr1-f68.google.com with SMTP id l2so19377971wrb.9 for ; Tue, 14 May 2019 07:09:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=NXD/cBlZtm4F6T0USEyOTof/8ULd1e59bS2+Zc/i//M=; b=j7XvgZ1MBiwUbby/RgTbwI4G6OYSavWSoDyW36gZkcPUTvA/uxze+gJOGwnnRANapP hXJa9sgTaA0ksfb1QGtuoUM8T09iYK4XonJ6nh6eLbA5PapFgZOmV53B9jHj3UUwZ4AM V9YtFT383FPZmH6V8Bp743uk90bKYNeuHAh6jb5ODHhpA7OOyIv2aB2G6MOPQD7uA6cb AZr7Y1z6dIK+a4sDLOJcMi8NFstBq56S8aevFCsMtA75eoVjIxJG4SN+gHzBCyAUVVck oot7ereDKHv+X0vD63Qbv8A8sJELvbkgSufmqieV4Wx0FIXlQdNoZ/NMiu+7ve7WN+wj jFqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=NXD/cBlZtm4F6T0USEyOTof/8ULd1e59bS2+Zc/i//M=; b=Tun7Yq8P4UEi4+Tbb+4xpLHbILWi6XEqp+i5DWbSnuO89wJ45EyDoMssG7BdM1fD6B 3WDg2WddzVhEf3B0M/9fx4keLnvaT5H28DtBjHMqxhqhlOhbBzzlqt+w+CsF2BWLOmTx SMd/WPSiTUA97CKOT0NrwMgvMpN0lrRYGZkTqnXtbhLpiI6kaqtXwPNpZOzCstn5l6rR 2Fqs4poy7MC0XfkQsQ7QZd29pqk9RQYR9cT4bB+Yr3PziakMEVz3zFYnUC2cqJoLAYpc 8xNIn1lQe+Fiix+sPI1/580ljISzHoB0cZaWdKE2AAsMT4ykjy5xRfr1pcpiAikPLk33 mn0w== X-Gm-Message-State: APjAAAWfgr4Y1KejHGYXWazN9nv33MHvmCZGJAREkPr7X5Y8H2T5IfEJ ok5ScSo+s6o4qf+cQ/mkqRs= X-Google-Smtp-Source: APXvYqwFMlk0bgh8bQLjL8tM7gJ767gnOGmmfMGPs6nQ93NdWQFpENrzv/CBnmMfF1MC7e6pRRx+7w== X-Received: by 2002:a5d:4945:: with SMTP id r5mr20913809wrs.328.1557842960054; Tue, 14 May 2019 07:09:20 -0700 (PDT) Received: from gmail.com (2E8B0CD5.catv.pool.telekom.hu. [46.139.12.213]) by smtp.gmail.com with ESMTPSA id n1sm2833483wmc.19.2019.05.14.07.09.18 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 14 May 2019 07:09:18 -0700 (PDT) Date: Tue, 14 May 2019 16:09:16 +0200 From: Ingo Molnar To: Dave Young Cc: Peter Zijlstra , Baoquan He , Borislav Petkov , j-nomura@ce.jp.nec.com, kasong@redhat.com, fanc.fnst@cn.fujitsu.com, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com, tglx@linutronix.de Subject: Re: [PATCH v6 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables Message-ID: <20190514140916.GA90245@gmail.com> References: <20190429135536.GC2324@zn.tnic> <20190513014248.GA16774@MiWiFi-R3L-srv> <20190513070725.GA20105@zn.tnic> <20190513073254.GB16774@MiWiFi-R3L-srv> <20190513075006.GB20105@zn.tnic> <20190513080653.GD16774@MiWiFi-R3L-srv> <20190514032208.GA25875@dhcp-128-65.nay.redhat.com> <20190514084841.GA27876@dhcp-128-65.nay.redhat.com> <20190514113826.GM2589@hirez.programming.kicks-ass.net> <20190514125835.GA29045@dhcp-128-65.nay.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190514125835.GA29045@dhcp-128-65.nay.redhat.com> 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 * Dave Young wrote: > On 05/14/19 at 01:38pm, Peter Zijlstra wrote: > > On Tue, May 14, 2019 at 04:48:41PM +0800, Dave Young wrote: > > > > > > I did some tests on the laptop, thing is: > > > > 1. apply the 3 patches (two you posted + Boris's revert commit 52b922c3d49c) > > > > on latest Linus master branch, everything works fine. > > > > > > > > 2. build and test the tip/next-merge-window branch, kernel hangs early > > > > without output, (both 1st boot and kexec boot) > > > > > > Update about 2. It should be not early rsdp related, I got the boot log > > > Since can not reproduce with Linus master branch it may have been fixed. > > > > Nothing was changed here since PTI. > > > > > [ 0.685374][ T1] rcu: Hierarchical SRCU implementation. > > > [ 0.686414][ T1] general protection fault: 0000 [#1] SMP PTI > > > [ 0.687328][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.1.0-rc6+ #877 > > > [ 0.687328][ T1] Hardware name: LENOVO 4236NUC/4236NUC, BIOS 83ET82WW (1.52 ) 06/04/2018 > > > [ 0.687328][ T1] RIP: 0010:reserve_ds_buffers+0x34e/0x450 > > > > > [ 0.687328][ T1] Call Trace: > > > [ 0.687328][ T1] ? hardlockup_detector_event_create+0x50/0x50 > > > [ 0.687328][ T1] x86_reserve_hardware+0x173/0x180 > > > [ 0.687328][ T1] x86_pmu_event_init+0x39/0x220 > > > > The DS buffers are special in that they're part of cpu_entrt_area. If > > this comes apart it might mean your pagetables are dodgy. > > Hmm, it seems caused by some WIP branch patches, I suspect below: > commit 124d6af5a5f559e516ed2c6ea857e889ed293b43 > x86/paravirt: Standardize 'insn_buff' variable names This commit had a bug which I fixed - could you try the latest -tip? Thanks, Ingo