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=-0.8 required=3.0 tests=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 B0871C10F29 for ; Mon, 9 Mar 2020 19:44:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9909024656 for ; Mon, 9 Mar 2020 19:44:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726610AbgCITor (ORCPT ); Mon, 9 Mar 2020 15:44:47 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:60524 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726168AbgCITor (ORCPT ); Mon, 9 Mar 2020 15:44:47 -0400 Received: from in01.mta.xmission.com ([166.70.13.51]) by out01.mta.xmission.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jBOKT-0000LK-LE; Mon, 09 Mar 2020 13:44:45 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=x220.xmission.com) by in01.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.87) (envelope-from ) id 1jBOKS-0006B0-CQ; Mon, 09 Mar 2020 13:44:45 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: "Dmitry V. Levin" Cc: Bernd Edlinger , Christian Brauner , Kees Cook , Jann Horn , Jonathan Corbet , Alexander Viro , Andrew Morton , Alexey Dobriyan , Thomas Gleixner , Oleg Nesterov , Frederic Weisbecker , Andrei Vagin , Ingo Molnar , "Peter Zijlstra \(Intel\)" , Yuyang Du , David Hildenbrand , Sebastian Andrzej Siewior , Anshuman Khandual , David Howells , James Morris , Greg Kroah-Hartman , Shakeel Butt , Jason Gunthorpe , Christian Kellner , Andrea Arcangeli , Aleksa Sarai , "linux-doc\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" , "linux-fsdevel\@vger.kernel.org" , "linux-mm\@kvack.org" , "stable\@vger.kernel.org" , "linux-api\@vger.kernel.org" References: <87v9ne5y4y.fsf_-_@x220.int.ebiederm.org> <87zhcq4jdj.fsf_-_@x220.int.ebiederm.org> <878sk94eay.fsf@x220.int.ebiederm.org> <87r1y12yc7.fsf@x220.int.ebiederm.org> <87k13t2xpd.fsf@x220.int.ebiederm.org> <87d09l2x5n.fsf@x220.int.ebiederm.org> <871rq12vxu.fsf@x220.int.ebiederm.org> <20200309193332.GA13534@altlinux.org> Date: Mon, 09 Mar 2020 14:42:26 -0500 In-Reply-To: <20200309193332.GA13534@altlinux.org> (Dmitry V. Levin's message of "Mon, 9 Mar 2020 22:33:33 +0300") Message-ID: <871rq11fj1.fsf@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1jBOKS-0006B0-CQ;;;mid=<871rq11fj1.fsf@x220.int.ebiederm.org>;;;hst=in01.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX19p24kmlglnsW31glyAX+zom+2dc6zCzvk= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH v2 5/5] exec: Add a exec_update_mutex to replace cred_guard_mutex X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Dmitry V. Levin" writes: > On Mon, Mar 09, 2020 at 02:02:37PM -0500, Eric W. Biederman wrote: >> Bernd Edlinger writes: >> >> > On 3/9/20 7:36 PM, Eric W. Biederman wrote: >> >> >> >> >> >> Does that sound better? >> >> >> > >> > almost done. >> >> I think this text is finally clean. >> >> exec: Add exec_update_mutex to replace cred_guard_mutex >> >> The cred_guard_mutex is problematic as it is held over possibly >> indefinite waits for userspace. The possilbe indefinite waits for > > -------------------------------------------^^^^^^^^ possible? Yes. Thank you. Fixed. Eric