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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 70729C433DF for ; Sat, 6 Jun 2020 01:01:20 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 22415206DB for ; Sat, 6 Jun 2020 01:01:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="y5y+gFTH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 22415206DB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 81C5080007; Fri, 5 Jun 2020 21:01:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7CCE18E0006; Fri, 5 Jun 2020 21:01:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6E23380007; Fri, 5 Jun 2020 21:01:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0064.hostedemail.com [216.40.44.64]) by kanga.kvack.org (Postfix) with ESMTP id 5423D8E0006 for ; Fri, 5 Jun 2020 21:01:19 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 1659A40FE for ; Sat, 6 Jun 2020 01:01:19 +0000 (UTC) X-FDA: 76896983478.11.grass35_5a03c1126da4 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id E03B3180F8B82 for ; Sat, 6 Jun 2020 01:01:18 +0000 (UTC) X-HE-Tag: grass35_5a03c1126da4 X-Filterd-Recvd-Size: 2708 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Sat, 6 Jun 2020 01:01:18 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BA287206A2; Sat, 6 Jun 2020 01:01:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591405277; bh=Gyeok/N2XeIirYf4qpDfR5nkHdIHhB9yRdTBcnOBxlU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=y5y+gFTH6+kErKJnfOvjHoR2SLZ8cPf/bNZXOh70Hzyk/fNOWUS9ByZnIL+ZJbAqJ BcZ53nV5l0yY0/DAeSCmQWk2k0PBd5PLgjQbkszO7mmt+k8rfNas4U4lgT8o/e+zd9 yR142U/GuFaL+gPPih6t4GsptIpLGBI9xlHXW11c= Date: Fri, 5 Jun 2020 18:01:16 -0700 From: Andrew Morton To: Catalin Marinas Cc: Joerg Roedel , x86@kernel.org, hpa@zytor.com, Dave Hansen , Andy Lutomirski , Peter Zijlstra , rjw@rjwysocki.net, Arnd Bergmann , Steven Rostedt , Vlastimil Babka , Michal Hocko , Matthew Wilcox , Joerg Roedel , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, Will Deacon Subject: Re: [PATCH v3 1/7] mm: Add functions to track page directory modifications Message-Id: <20200605180116.196116ea218df55f3252af57@linux-foundation.org> In-Reply-To: <20200605114654.GD31371@gaia> References: <20200515140023.25469-1-joro@8bytes.org> <20200515140023.25469-2-joro@8bytes.org> <20200605100813.GA31371@gaia> <20200605114654.GD31371@gaia> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E03B3180F8B82 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 5 Jun 2020 12:46:55 +0100 Catalin Marinas wrote: > On Fri, Jun 05, 2020 at 11:08:13AM +0100, Catalin Marinas wrote: > > This patch causes a kernel panic on arm64 (and possibly powerpc, I > > haven't tried). arm64 still uses the 5level-fixup.h and pud_alloc() > > checks for the empty p4d with pgd_none() instead of p4d_none(). > > Ah, should have checked the list first > (https://lore.kernel.org/linux-mm/20200604074446.23944-1-joro@8bytes.org/). > Sorry about that. Can you confirm that the merge of Mike's 5level_hack zappage has fixed the arm64 wontboot?