From mboxrd@z Thu Jan 1 00:00:00 1970 From: Catalin Marinas Subject: Re: [PATCH v3 1/7] mm: Add functions to track page directory modifications Date: Sat, 6 Jun 2020 13:50:22 +0100 Message-ID: <20200606125021.GA12556@gaia> References: <20200515140023.25469-1-joro@8bytes.org> <20200515140023.25469-2-joro@8bytes.org> <20200605100813.GA31371@gaia> <20200605114654.GD31371@gaia> <20200605180116.196116ea218df55f3252af57@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from foss.arm.com ([217.140.110.172]:36658 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728102AbgFFMu1 (ORCPT ); Sat, 6 Jun 2020 08:50:27 -0400 Content-Disposition: inline In-Reply-To: <20200605180116.196116ea218df55f3252af57@linux-foundation.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Andrew Morton 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 On Fri, Jun 05, 2020 at 06:01:16PM -0700, Andrew Morton wrote: > 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/). > > Can you confirm that the merge of Mike's 5level_hack zappage has fixed > the arm64 wontboot? Yes, it has. Mainline is booting again on arm64. Thanks. -- Catalin