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=-4.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 A9881C433E2 for ; Wed, 15 Jul 2020 14:16:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8941B206F5 for ; Wed, 15 Jul 2020 14:16:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="hgOSV1AX"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Tm+QHIA9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727999AbgGOOQ0 (ORCPT ); Wed, 15 Jul 2020 10:16:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726834AbgGOOQZ (ORCPT ); Wed, 15 Jul 2020 10:16:25 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74473C061755; Wed, 15 Jul 2020 07:16:25 -0700 (PDT) Date: Wed, 15 Jul 2020 16:16:22 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1594822583; 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=9MVvQyO+jCrVVB3QDS1JKwfFe3gjJSwdqICpDxVzZvk=; b=hgOSV1AXBaEWIWAOGdQMpggwpCKaYYY/XQCg/OEvpi9XR75jYdPDyPl05FoArS7p1VOluO 2U0WUshJ/ca/bUAe9ajG193cHmCnf62Ypex3pKOhD6rVSDgMKmG956AN5LlF2XyZfOs3Kq VHVrThBcSmMe/tVTF73FW2A6j6cG0+i0Dy7a9sMv19nCpCnF8JXIkK42gEaM1B1uWwfNel lfTfi5QZMkJvIi4iv/MSGxLLj2tziUH5ZybQHnifEFPaHDGEyM0pygmvXozIKB3w28Evgj nlQelESIzmIifruYvUtK2uvjN6R3O3ys7SPwtCCwclM1fbFRuIhv6S7jTADGnA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1594822583; 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=9MVvQyO+jCrVVB3QDS1JKwfFe3gjJSwdqICpDxVzZvk=; b=Tm+QHIA9ZIr56ueY4vkbTwnnhcAkHf6e9hnMhIrC2XKLI/WqhF7vGsRjYQazP3eoPMMvWf /PzIUxpTSF+VVPAA== From: Sebastian Andrzej Siewior To: Uladzislau Rezki Cc: paulmck@kernel.org, joel@joelfernandes.org, rcu@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com Subject: Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT Message-ID: <20200715141622.zd2h3mnhd7ypd2fp@linutronix.de> References: <20200624201200.GA28901@paulmck-ThinkPad-P72> <20200624201226.21197-3-paulmck@kernel.org> <20200630164543.4mdcf6zb4zfclhln@linutronix.de> <20200715133808.GA24778@pc636> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200715133808.GA24778@pc636> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-07-15 15:38:08 [+0200], Uladzislau Rezki wrote: > > As of -rc3 it should complain about printk() which is why it is still disabled by default. > > > Have you tried to trigger a "complain" you are talking about? No, but I is wrong because a raw_spinlock_t is acquired followed by a spinlock_t. > I suspect to get some trace dump when CONFIG_PROVE_RAW_LOCK_NESTING=y. You should get one if you haven't received any splat earlier (like from printk code because it only triggers once). > Thank you. Sebastian