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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 290DCC433EF for ; Thu, 21 Apr 2022 20:53:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9381E6B0072; Thu, 21 Apr 2022 16:53:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8E8476B0073; Thu, 21 Apr 2022 16:53:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7B0E66B0074; Thu, 21 Apr 2022 16:53:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.25]) by kanga.kvack.org (Postfix) with ESMTP id 6BF616B0072 for ; Thu, 21 Apr 2022 16:53:37 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 33BA8277E8 for ; Thu, 21 Apr 2022 20:53:37 +0000 (UTC) X-FDA: 79382087274.03.EC43F9C Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by imf29.hostedemail.com (Postfix) with ESMTP id 8EC3C12001D for ; Thu, 21 Apr 2022 20:53:35 +0000 (UTC) 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 Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=linutronix.de header.s=2020 header.b=Z2da5xXN; dkim=pass header.d=linutronix.de header.s=2020e header.b=2vKnrJ5q; spf=pass (imf29.hostedemail.com: domain of tglx@linutronix.de designates 193.142.43.55 as permitted sender) smtp.mailfrom=tglx@linutronix.de; dmarc=pass (policy=none) header.from=linutronix.de X-Stat-Signature: 8cnj3kahttehz4ysm7ht6wk7znta9pn8 X-Rspamd-Queue-Id: 8EC3C12001D X-Rspamd-Server: rspam04 X-Rspam-User: X-HE-Tag: 1650574415-323318 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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