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=-1.0 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 E876CC4BA0A for ; Wed, 26 Feb 2020 04:10:41 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 928502082F for ; Wed, 26 Feb 2020 04:10:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 928502082F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=bugzilla.kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48S2Qk4VrtzDqfX for ; Wed, 26 Feb 2020 15:10:38 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=srs0=+jiy=4o=bugzilla.kernel.org=bugzilla-daemon@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=bugzilla.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48S2LS2TNJzDqHK for ; Wed, 26 Feb 2020 15:06:55 +1100 (AEDT) From: bugzilla-daemon@bugzilla.kernel.org To: linuxppc-dev@lists.ozlabs.org Subject: [Bug 206669] Little-endian kernel crashing on POWER8 on heavy big-endian PowerKVM load Date: Wed, 26 Feb 2020 04:06:53 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Product: Platform Specific/Hardware X-Bugzilla-Component: PPC-64 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: npiggin@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" https://bugzilla.kernel.org/show_bug.cgi?id=3D206669 --- Comment #1 from npiggin@gmail.com --- bugzilla-daemon@bugzilla.kernel.org's on February 26, 2020 1:26 am: > https://bugzilla.kernel.org/show_bug.cgi?id=3D206669 >=20 > Bug ID: 206669 > Summary: Little-endian kernel crashing on POWER8 on heavy > big-endian PowerKVM load > Product: Platform Specific/Hardware > Version: 2.5 > Kernel Version: 5.4.x > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: PPC-64 > Assignee: platform_ppc-64@kernel-bugs.osdl.org > Reporter: glaubitz@physik.fu-berlin.de > CC: matorola@gmail.com > Regression: No >=20 > Created attachment 287605 > --> https://bugzilla.kernel.org/attachment.cgi?id=3D287605&action=3Dedit > Backtrace of host system crashing with little-endian kernel >=20 > We have an IBM POWER server (8247-42L) running Linux kernel 5.4.13 on Deb= ian > unstable hosting a big-endian ppc64 virtual machine running the same kern= el > in > big-endian mode. >=20 > When building OpenJDK-11 on the big-endian VM, the testsuite crashes the > *host* > system which is little-endian with the following kernel backtrace. The > problem > reproduces both with kernel 4.19.98 as well as 5.4.13, both guest and host > running 5.4.x. >=20 > Backtrace attached. Thanks for the report, we need to get more data about the first BUG if=20 we can. What function in your vmlinux contains address=20 0xc00000000017a778? (use nm or objdump etc) Is that the first message you g= et, No warnings or anything else earlier in the dmesg? Also 0xc0000000002659a0 would be interesting. When reproducing, do you ever get a clean trace of the first bug? Could you try setting /proc/sys/kernel/panic_on_oops and reproducing? Thanks, Nick --=20 You are receiving this mail because: You are watching the assignee of the bug.=