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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 6C2C7C5DF60 for ; Tue, 5 Nov 2019 18:22:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4382521A49 for ; Tue, 5 Nov 2019 18:22:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390712AbfKESWS (ORCPT ); Tue, 5 Nov 2019 13:22:18 -0500 Received: from mail.kernel.org ([198.145.29.99]:55168 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390482AbfKESWS (ORCPT ); Tue, 5 Nov 2019 13:22:18 -0500 Received: from arrakis.emea.arm.com (unknown [46.69.195.45]) (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 DE68721A4A; Tue, 5 Nov 2019 18:22:15 +0000 (UTC) Date: Tue, 5 Nov 2019 18:22:13 +0000 From: Catalin Marinas To: Amir Goldstein Cc: Theodore Tso , fstests , Matthew Wilcox , Michal Hocko , Qian Cai , Andrew Morton , Linus Torvalds , Linux MM , linux-kernel , Thomas Gleixner Subject: Re: 5.4-rc1 boot regression with kmemleak enabled Message-ID: <20191105182212.GF22987@arrakis.emea.arm.com> References: <20191105115431.GD26580@mbp> <20191105153055.GC22987@arrakis.emea.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: fstests-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org On Tue, Nov 05, 2019 at 08:17:11PM +0200, Amir Goldstein wrote: > On Tue, Nov 5, 2019 at 5:31 PM Catalin Marinas wrote: > > > > On Tue, Nov 05, 2019 at 02:33:48PM +0200, Amir Goldstein wrote: > > > On Tue, Nov 5, 2019 at 1:54 PM Catalin Marinas wrote: > > > > (sorry if you got this message twice; our SMTP server went bust) > > > > > > > > On Tue, Nov 05, 2019 at 09:14:06AM +0200, Amir Goldstein wrote: > > > > > My kvm-xfstests [1] VM doesn't boot with kmemleak enabled since commit > > > > > c5665868183f ("mm: kmemleak: use the memory pool for early allocations"). > > > > > > > > > > There is no console output when running: > > > > > > > > > > $ kvm -boot order=c -net none -machine type=pc,accel=kvm:tcg -cpu host \ > > > > > -drive file=$ROOTFS,if=virtio,snapshot=on -vga none -nographic \ > > > > > -smp 2 -m 2048 -serial mon:stdio --kernel $KERNEL \ > > > > > --append 'root=/dev/vda console=ttyS0,115200' > > > > > > > > This was fixed in 5.4-rc4, see commit 2abd839aa7e6 ("kmemleak: Do not > > > > corrupt the object_list during clean-up"). > > > > > > Did not fix my issue. > > > Still not booting with 5.4-rc6. > > > Any other suggestions? > > > > Can you pass an earlyprintk=ttyS0,115200 (if that's the correct x86 > > syntax) on the kernel command line? It may print some early messages > > that would help with debugging. [...] > [ 0.022796] BUG: unable to handle page fault for address: 0000000000001ff0 > [ 0.023682] #PF: supervisor read access in kernel mode > [ 0.024341] #PF: error_code(0x0000) - not-present page > [ 0.025000] PGD 0 P4D 0 > [ 0.025326] Oops: 0000 [#1] SMP PTI > [ 0.025775] CPU: 0 PID: 0 Comm: swapper Not tainted 5.4.0-rc6-xfstests #4302 > [ 0.026683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 > [ 0.027836] RIP: 0010:get_stack_info+0xa7/0x146 Ah, it looks very similar to this report: http://lkml.kernel.org/r/20191019114421.GK9698@uranus.lan Thomas had a patch here: https://lore.kernel.org/linux-mm/alpine.DEB.2.21.1910231950590.1852@nanos.tec.linutronix.de/ but not sure whether it has hit mainline yet. -- Catalin