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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 0EDC1C433F5 for ; Fri, 24 Aug 2018 20:04:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A97462151C for ; Fri, 24 Aug 2018 20:04:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=purestorage.com header.i=@purestorage.com header.b="c6KZfCKp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A97462151C Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=purestorage.com 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 S1727652AbeHXXka (ORCPT ); Fri, 24 Aug 2018 19:40:30 -0400 Received: from mail-lf1-f54.google.com ([209.85.167.54]:44467 "EHLO mail-lf1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726855AbeHXXk3 (ORCPT ); Fri, 24 Aug 2018 19:40:29 -0400 Received: by mail-lf1-f54.google.com with SMTP id g6-v6so7546569lfb.11 for ; Fri, 24 Aug 2018 13:04:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=purestorage.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LlWSQBxY1v7f/X3Sm4jQMGTF0EAGOAzf/BsBZ9BFuNw=; b=c6KZfCKp18T6T7r2k/eq5g/qmhtYxGrtnmHapapGRVCUWW/gc5SzJijBj4jKqkkUrm q8ZzXfyzZcSGznf1ZWJoNszHXFNtkLGVaNVNS9vx7CfieOmNAW/L6HRI2gA33dii72Zy 8aCQv408aYyqhSZlQj21pc4LHnPWVdVOYnE+Y= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LlWSQBxY1v7f/X3Sm4jQMGTF0EAGOAzf/BsBZ9BFuNw=; b=CgzdS+/5HmSMb6EgjisOFWPIIZ7GQSrqhJVE68tFzyUFic1AlVvsmhRAnNbS+KdMMH MId1igJyLksay9MD/atY7gYk1XcC9fIvcsTWHYs48UQ++RdNYS6QbCbfWUXRoFzW1ajc qN8atZFJQwmzsbiBdb9GZIij7KV/St2cWbXdhzW04ttCuU45P21oaoqH0mxlO+9zz1Vj YfnAKR6+c6ti2YRacc1K3pUOjD0mG/izIeUJwgV1luoZ45HgCbsnAhnxUV0qggcjHfyP a+hRGIjf+6uiK1HQrLw/DkCn5dvoipoIDoAKBqdtbRyQqLuKSLAwnwkW8eHfUXdwBRdI zC+A== X-Gm-Message-State: APzg51Bd5d1zZsUM/haOWT2zezZQuhCNghrOBvXBopC+N/6b2v6IsPsY 11OFpS8LAaYRZB8Vyhp/ibFvPiypPLSWFX+4yXkbhg== X-Google-Smtp-Source: ANB0VdbA8MZJ1wF6YHr5Rq3evP4VKS9v6HajbfRBNByWuGAFQahJuTfdue/EZ+l9PEbyV4fEzabMqoEHHy+LLIkoZmI= X-Received: by 2002:a19:ea52:: with SMTP id i79-v6mr2147458lfh.75.1535141062663; Fri, 24 Aug 2018 13:04:22 -0700 (PDT) MIME-Version: 1.0 References: <20171215092305.994559179@linuxfoundation.org> <20171215092311.347628971@linuxfoundation.org> <1535129126.2902.36.camel@codethink.co.uk> <20180824191749.GA15489@kroah.com> In-Reply-To: <20180824191749.GA15489@kroah.com> From: Roland Dreier Date: Fri, 24 Aug 2018 13:04:09 -0700 Message-ID: Subject: Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers" To: Greg Kroah-Hartman Cc: linux@roeck-us.net, 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 Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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. - R.