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=-5.7 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,URIBL_BLOCKED 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 27420C4361B for ; Mon, 7 Dec 2020 09:10:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE30A233ED for ; Mon, 7 Dec 2020 09:10:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726559AbgLGJKt (ORCPT ); Mon, 7 Dec 2020 04:10:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726016AbgLGJKs (ORCPT ); Mon, 7 Dec 2020 04:10:48 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 407BBC0613D2 for ; Mon, 7 Dec 2020 01:10:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=8szot9NMsCuJ25GCKgI3M1SToKjGBecHZsxjwxUUwM0=; b=hUDKwgNQe/SqOvdmSCIXhtArSc gyojb2EO2V4ivTWuP20LiVRE9xTqmeCKRiw7L3B93qfRszcIrcGeXmZ0PAyim16UJFuKErXAg68nZ W6fob7YT3JjuCUj3CLTDq58dQrWEm81ffMOgjsbBqkJgN3T+J3WBy/kgfjlNOtWOze+YfFjjPyuYD UVDp0w6xuopowg3xQoBeW8pvCixXnxoent1721BfxEVtnWfrrTCkDA2uYx36c89UqDsxbExOtpGI/ aNAkAyWicNhAmtg+mMa00GqwrohHs7OO7M00Fr03tKCQcnAUbXMab1HOf1T+AVhd3ggROPXCYc/yZ 5GYe8s7Q==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmCWp-00082k-C2; Mon, 07 Dec 2020 09:09:55 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 607E1301478; Mon, 7 Dec 2020 10:09:53 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 4358D200E0BA7; Mon, 7 Dec 2020 10:09:53 +0100 (CET) Date: Mon, 7 Dec 2020 10:09:53 +0100 From: Peter Zijlstra To: Linus Torvalds Cc: Bernd Edlinger , "Eric W. Biederman" , Linux Kernel Mailing List , Ingo Molnar , Will Deacon , Jann Horn , Vasiliy Kulikov , Al Viro , Oleg Nesterov , Cyrill Gorcunov , Sargun Dhillon , Christian Brauner , Arnd Bergmann , Arnaldo Carvalho de Melo , Waiman Long , Davidlohr Bueso Subject: Re: [PATCH 3/3] exec: Transform exec_update_mutex into a rw_semaphore Message-ID: <20201207090953.GF3040@hirez.programming.kicks-ass.net> References: <87tut2bqik.fsf@x220.int.ebiederm.org> <87ft4mbqen.fsf@x220.int.ebiederm.org> <875z5h4b7a.fsf@x220.int.ebiederm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 04, 2020 at 12:48:18PM -0800, Linus Torvalds wrote: > On Fri, Dec 4, 2020 at 12:30 PM Bernd Edlinger > wrote: > >> > > > perf_event_open (exec_update_mutex -> ovl_i_mutex) > > Side note: this one looks like it should be easy to fix. > PeterZ, is there something I'm missing? Like this? https://lkml.kernel.org/r/20200828123720.GZ1362448@hirez.programming.kicks-ass.net