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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 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 8FE2AC33C9E for ; Wed, 8 Jan 2020 11:24:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A42F206DB for ; Wed, 8 Jan 2020 11:24:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726180AbgAHLYi (ORCPT ); Wed, 8 Jan 2020 06:24:38 -0500 Received: from smtp.gentoo.org ([140.211.166.183]:49536 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726107AbgAHLYh (ORCPT ); Wed, 8 Jan 2020 06:24:37 -0500 Received: from wim.jer (jer.xs4all.nl [212.238.182.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jer) by smtp.gentoo.org (Postfix) with ESMTPSA id A051C34DEAE; Wed, 8 Jan 2020 11:24:31 +0000 (UTC) Date: Wed, 8 Jan 2020 12:24:21 +0100 From: Jeroen Roovers To: Mikulas Patocka Cc: Mike Rapoport , linux-parisc@vger.kernel.org, Meelis Roos , Helge Deller , Anatoly Pugachev , Anton Ivanov , Arnd Bergmann , "David S. Miller" , Geert Uytterhoeven , Greentime Hu , Greg Ungerer , "James E.J. Bottomley" , Jeff Dike , John David Anglin , "Kirill A. Shutemov" , Mark Salter , Matt Turner , Michal Simek , Peter Rosin , Richard Weinberger , Rolf Eike Beer , Russell King , Russell King , Sam Creasey , Vincent Chen , Vineet Gupta , Andrew Morton Subject: Re: new panic in 5.5-rc1 (parisc, kmem_cache_open) Message-ID: <20200108122421.37e3d709@wim.jer> In-Reply-To: References: <20191209202626.0f2c2112@wim.jer> <20200108080208.GA8272@linux.ibm.com> Organization: Gentoo Foundation X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On Wed, 8 Jan 2020 05:05:24 -0500 (EST) Mikulas Patocka wrote: > On Wed, 8 Jan 2020, Mike Rapoport wrote: > > > On Tue, Jan 07, 2020 at 09:52:20AM -0500, Mikulas Patocka wrote: > > > > > > On Mon, 9 Dec 2019, Jeroen Roovers wrote: > > > > > > > On Mon, 9 Dec 2019 20:22:17 +0200 > > > > Meelis Roos wrote: > > > > > > > > > I tried 5.5-rc1 on RP3440 and got a surprise panic on boot > > > > > (5.4 worked): > > > > > > > > Ah, I was going to reported this, too. > > > > > > > > > mem auto-init: stack:off, heap alloc:off, heap free:off > > > > > Memory: 12348004K/12580864K available (6438K kernel code, > > > > > 2148K rwdata, 954K rodata, 1193K init, 500K bss, 232860K > > > > > reserved, 0K cma-reserved) > > > > > > > > I see an additional message after this: > > > > > > > > random: get_random_u64 called from > > > > __kmem_cache_create+0x70/0x660 with crng_init=0 > > > > > > > > And then the same or similar enough backtrace. > > > > > > > > > > > > Regards, > > > > jer > > > > > > Hi > > > > > > I also have this panic. I bisected it and it is caused by the > > > patch d96885e277b5edcd1e474e8b1579005163f23dbe. > > > > My guess would be that pgd is not populated after the change. > > Can you please check if the below hack fixes the crash? > > > > > > diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c > > index ddca8287d43b..354cf060b67f 100644 > > --- a/arch/parisc/mm/init.c > > +++ b/arch/parisc/mm/init.c > > @@ -401,7 +401,7 @@ static void __init map_pages(unsigned long > > start_vaddr, pmd = (pmd_t *) __pa(pmd); > > } > > > > - pgd_populate(NULL, pg_dir, __va(pmd)); > > + pud_populate(NULL, (pud_t *)pg_dir, __va(pmd)); > > #endif > > pg_dir++; > > > > > > Test-by: Mikulas Patocka > > This patch fixes it. > > Mikulas > Fixes the issue on a C8000. Tested-by: Jeroen Roovers Thanks, jer