From patchwork Wed May 18 22:53:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Eric W. Biederman" X-Patchwork-Id: 574094 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5F0CC433EF for ; Wed, 18 May 2022 22:55:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230349AbiERWy6 (ORCPT ); Wed, 18 May 2022 18:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230303AbiERWyo (ORCPT ); Wed, 18 May 2022 18:54:44 -0400 Received: from out02.mta.xmission.com (out02.mta.xmission.com [166.70.13.232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F11E42265DA; Wed, 18 May 2022 15:54:43 -0700 (PDT) Received: from in01.mta.xmission.com ([166.70.13.51]:54926) by out02.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1nrSYx-003baE-OK; Wed, 18 May 2022 16:54:39 -0600 Received: from ip68-227-174-4.om.om.cox.net ([68.227.174.4]:38724 helo=localhost.localdomain) by in01.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1nrSYu-002Z0O-LI; Wed, 18 May 2022 16:54:38 -0600 From: "Eric W. Biederman" To: linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net, Oleg Nesterov , mingo@kernel.org, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, mgorman@suse.de, bigeasy@linutronix.de, Will Deacon , tj@kernel.org, linux-pm@vger.kernel.org, Peter Zijlstra , Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org, Kees Cook , Jann Horn , linux-ia64@vger.kernel.org, Robert OCallahan , Kyle Huey , Richard Henderson , Ivan Kokshaysky , Matt Turner , Jason Wessel , Daniel Thompson , Douglas Anderson , Douglas Miller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , "Eric W. Biederman" Date: Wed, 18 May 2022 17:53:43 -0500 Message-Id: <20220518225355.784371-4-ebiederm@xmission.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <871qwq5ucx.fsf_-_@email.froward.int.ebiederm.org> References: <871qwq5ucx.fsf_-_@email.froward.int.ebiederm.org> MIME-Version: 1.0 X-XM-SPF: eid=1nrSYu-002Z0O-LI; ; ; mid=<20220518225355.784371-4-ebiederm@xmission.com>; ; ; hst=in01.mta.xmission.com; ; ; ip=68.227.174.4; ; ; frm=ebiederm@xmission.com; ; ; spf=softfail X-XM-AID: U2FsdGVkX1/XPnwfZQEHyZ9WrXatAJldgaE0eiN7zxc= X-SA-Exim-Connect-IP: 68.227.174.4 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: [PATCH 04/16] powerpc/xmon: Use real_parent when displaying a list of processes X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org xmon has a bug (copied from kdb) that when showing a list of processes the debugger is listed as the parent, if a processes is being debugged. This is silly, and I expect it is rare enough no has noticed in practice. Update the code to use real_parent so that it is clear xmon does not want to display a debugger as the parent of a process. Cc: Douglas Miller Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Fixes: 6dfb54049f9a ("powerpc/xmon: Add xmon command to dump process/task similar to ps(1)") Signed-off-by: "Eric W. Biederman" --- arch/powerpc/xmon/xmon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index fd72753e8ad5..b308ef9ce604 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -3282,7 +3282,7 @@ static void show_task(struct task_struct *volatile tsk) printf("%16px %16lx %16px %6d %6d %c %2d %s\n", tsk, tsk->thread.ksp, tsk->thread.regs, - tsk->pid, rcu_dereference(tsk->parent)->pid, + tsk->pid, rcu_dereference(tsk->real_parent)->pid, state, task_cpu(tsk), tsk->comm); }