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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 BA28AC433F5 for ; Sat, 25 Aug 2018 15:07:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6084221766 for ; Sat, 25 Aug 2018 15:07:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6084221766 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org 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 S1726898AbeHYSqn (ORCPT ); Sat, 25 Aug 2018 14:46:43 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:37838 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726672AbeHYSqn (ORCPT ); Sat, 25 Aug 2018 14:46:43 -0400 Received: from localhost (5355525A.cm-6-6b.dynamic.ziggo.nl [83.85.82.90]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 9E0CC3EE; Sat, 25 Aug 2018 15:07:26 +0000 (UTC) Date: Sat, 25 Aug 2018 17:07:23 +0200 From: Greg Kroah-Hartman To: Guenter Roeck Cc: Roland Dreier , Ben Hutchings , LKML , stable@vger.kernel.org, matt@codeblueprint.co.uk, bp@suse.de, Andrew Morton , Andy Lutomirski , luto@kernel.org, Ard Biesheuvel , bp@alien8.de, brgerst@gmail.com, davej@codemonkey.org.uk, dvlasenk@redhat.com, "H. Peter Anvin" , Linus Torvalds , Peter Zijlstra , sai.praneeth.prakhya@intel.com, sds@tycho.nsa.gov, Thomas Gleixner , toshi.kani@hp.com, linux-efi@vger.kernel.org, Ingo Molnar , Yazen.Ghannam@amd.com Subject: Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers" Message-ID: <20180825150723.GA10230@kroah.com> References: <20171215092305.994559179@linuxfoundation.org> <20171215092311.347628971@linuxfoundation.org> <1535129126.2902.36.camel@codethink.co.uk> <20180824191749.GA15489@kroah.com> <35e0f79b-6fac-5027-6377-67dbe2a293b9@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <35e0f79b-6fac-5027-6377-67dbe2a293b9@roeck-us.net> 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 On Sat, Aug 25, 2018 at 06:52:32AM -0700, Guenter Roeck wrote: > Hi Roland, > > On 08/24/2018 01:04 PM, Roland Dreier wrote: > > > Ok, so what patch should be reverted? I'm seeing other reports of > > > problems all around this same area, but I can't figure out exactly what > > > to do. > > > > Are any of those reports public? If so can you point me at them, I'm > > curious if the symptoms match up. > > > > I don't think we want to revert anything. I think you should pull in > > edc3b9129cec and at least the first three patches that Ben listed: > > > > 21cdb6b56843 x86/mm: Page align the '_end' symbol to avoid pfn conversion bugs > > b61a76f8850d x86/efi: Map RAM into the identity page table for mixed mode > > 753b11ef8e92 x86/efi: Setup separate EFI page tables in kexec paths > > > > the first patch takes a bit of massaging (mostly because some of it is > > already touched by 02ff2769edbc, which keeps the changes from > > edc3b9129cec, and so we can drop a good bit when applying). The other > > three apply cleanly. > > > > I'm currently testing that and can send you the state of my tree in a bit. > > > > Have you made any progress ? On my side I am still out of luck since I can not > reproduce the problem. Perhaps just the patch that Andi posted to the stable list helps out here? Roland, can you try just that? thanks, greg k-h