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[2620:137:e000::1:18]) by mx.google.com with ESMTPS id i23-20020a63e917000000b00381facb2ec6si9803170pgh.728.2022.04.22.12.52.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Apr 2022 12:52:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=Z2da5xXN; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0011317DA22; Fri, 22 Apr 2022 11:53:42 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1392589AbiDUU43 (ORCPT + 99 others); Thu, 21 Apr 2022 16:56:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1392581AbiDUU41 (ORCPT ); Thu, 21 Apr 2022 16:56:27 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 642734EA0E for ; Thu, 21 Apr 2022 13:53:37 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1650574415; 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=PT9HLnsWqMyOpJljXXp/fF3cSHjKWA5LWsbcnozNFkg=; b=Z2da5xXNMelnWHAK6E9QMU10T2Kpp6QXbFEjp4sPq1Nd782FBHrJQPCPM5I9NktefxSVzq T1CZ9+sujVB0JZNScSg14nssWqZ8vDBcL2+LRu3mZfAM8N/M4p/iICjmCWuyddiOVbO4Jw pab+oIWhAfHE0AVLKhV5Il///yy136rt5uBxITLRqGQoa9DdbFs50hiBbn/2JRvy63XvpL 0NACoecceykjTkwAiiq8AqVU6e+WTEfyu9IC0eBdeO/lazoS3BA0YSgc478TGpILSBsYRY FzHYCFgpFVtk4/QBhA2DlgZySqbfMB5bT9TdglwscYHRKEL79m/pwZntLRCWxg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1650574415; 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=PT9HLnsWqMyOpJljXXp/fF3cSHjKWA5LWsbcnozNFkg=; b=2vKnrJ5qVNWSV8YPmqQq3J3EssDw0ZgL2xnIP3m0+WW3kVKJFx3BEdhheKjrN811l8RDY6 FSg2jGMqj7JPcWDw== To: Nico Pache , linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Morton , Ingo Molnar , Peter Zijlstra , Darren Hart , Davidlohr Bueso , =?utf-8?Q?An?= =?utf-8?Q?dr=C3=A9?= Almeida , Arjan van de Ven Subject: Re: [RFC 2/3] futex: exit: Print a warning when futex_cleanup fails In-Reply-To: <20220421190533.1601879-3-npache@redhat.com> References: <20220421190533.1601879-1-npache@redhat.com> <20220421190533.1601879-3-npache@redhat.com> Date: Thu, 21 Apr 2022 22:53:34 +0200 Message-ID: <87r15qrwdt.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 21 2022 at 15:05, Nico Pache wrote: > The futex_cleanup routines currently fails silently. > > Allow the futex_cleanup routines to fail more verbosely so we can > leave a message behind for easier debugging/error detecting. This is a free ticket to spam dmesg for any unpriviledged user. > Fixes: 0771dfefc9e5 ("[PATCH] lightweight robust futexes: core") There is nothing to fix, really. Robust futexes are best effort as I explained you before and spamming dmesg won't help anything. Thanks, tglx