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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 7FCC6C433DB for ; Fri, 8 Jan 2021 03:36:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 37633235F7 for ; Fri, 8 Jan 2021 03:36:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727085AbhAHDe2 (ORCPT ); Thu, 7 Jan 2021 22:34:28 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:22086 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726099AbhAHDe1 (ORCPT ); Thu, 7 Jan 2021 22:34:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610076781; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=9r4Pdy09qEYXjuml8aWm+l9qvq4G6oNjWDZjtL93/QY=; b=OSp1KCiFex2Ym/ljABuIc74nX+t9Xh2MkSlxIspqNgKSgtZ5oER970tl0aZZB11uP23Xda m44Hn2UvRfYeWKeXoxbvpg/vVoeR0YRPt2Qv2KnJVzXMMDoWiLVfl/8OTGfmpVYK7V19ZZ KauH0nsowJ7+anHPs9uvOaRjpp1eW54= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-530-7ka37owhPUyz3pdAnJvUdQ-1; Thu, 07 Jan 2021 22:32:57 -0500 X-MC-Unique: 7ka37owhPUyz3pdAnJvUdQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 97D0A10054FF; Fri, 8 Jan 2021 03:32:55 +0000 (UTC) Received: from localhost (ovpn-12-180.pek2.redhat.com [10.72.12.180]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 316855D9DE; Fri, 8 Jan 2021 03:32:50 +0000 (UTC) Date: Fri, 8 Jan 2021 11:32:48 +0800 From: Baoquan He To: gregkh@linuxfoundation.org, Alexander Egorenkov Cc: dyoung@redhat.com, vgoyal@redhat.com, lijiang@redhat.com, ebiederm@xmission.com, akpm@linux-foundation.org, ktkhai@virtuozzo.com, keescook@chromium.org, christian.brauner@ubuntu.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/1] kdump: append uts_namespace.name offset to VMCOREINFO Message-ID: <20210108033248.GA4959@MiWiFi-R3L-srv> References: <20200930102328.396488-1-egorenar@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200930102328.396488-1-egorenar@linux.ibm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/30/20 at 12:23pm, Alexander Egorenkov wrote: > The offset of the field 'init_uts_ns.name' has changed > since commit 9a56493f6942 ("uts: Use generic ns_common::count"). This patch is merged into 5.11-rc1, but we met the makedumpfile failure of kdump test case in 5.10.0 kernel. Should affect 5.9 too since commit 9a56493f6942 is merged into 5.9-rc2. Below tag and CC should have been added into patch when posted. Fixes: commit 9a56493f6942 ("uts: Use generic ns_common::count") Cc: Hi Greg, Do we still have chance to make it added into stable? Thanks Baoquan > > Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain > > Make the offset of the field 'uts_namespace.name' available > in VMCOREINFO because tools like 'crash-utility' and > 'makedumpfile' must be able to read it from crash dumps. > > Signed-off-by: Alexander Egorenkov > --- > > v2 -> v3: > * Added documentation to vmcoreinfo.rst > * Use the short form of the commit reference > > v1 -> v2: > * Improved commit message > * Added link to the discussion of the uts namespace changes > > Documentation/admin-guide/kdump/vmcoreinfo.rst | 6 ++++++ > kernel/crash_core.c | 1 + > 2 files changed, 7 insertions(+) > > diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst > index e44a6c01f336..3861a25faae1 100644 > --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst > +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst > @@ -39,6 +39,12 @@ call. > User-space tools can get the kernel name, host name, kernel release > number, kernel version, architecture name and OS type from it. > > +(uts_namespace, name) > +--------------------- > + > +Offset of the name's member. Crash Utility and Makedumpfile get > +the start address of the init_uts_ns.name from this. > + > node_online_map > --------------- > > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index 106e4500fd53..173fdc261882 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -447,6 +447,7 @@ static int __init crash_save_vmcoreinfo_init(void) > VMCOREINFO_PAGESIZE(PAGE_SIZE); > > VMCOREINFO_SYMBOL(init_uts_ns); > + VMCOREINFO_OFFSET(uts_namespace, name); > VMCOREINFO_SYMBOL(node_online_map); > #ifdef CONFIG_MMU > VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir); > -- > 2.26.2 >