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 AC230C10F25 for ; Mon, 9 Mar 2020 19:33:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 561282465A for ; Mon, 9 Mar 2020 19:33:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 561282465A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=altlinux.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 065BC6B0007; Mon, 9 Mar 2020 15:33:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0166A6B0008; Mon, 9 Mar 2020 15:33:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E96426B000A; Mon, 9 Mar 2020 15:33:35 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0181.hostedemail.com [216.40.44.181]) by kanga.kvack.org (Postfix) with ESMTP id CEF536B0007 for ; Mon, 9 Mar 2020 15:33:35 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id A859B34A4 for ; Mon, 9 Mar 2020 19:33:35 +0000 (UTC) X-FDA: 76576823190.12.books98_3c65992788b1a X-HE-Tag: books98_3c65992788b1a X-Filterd-Recvd-Size: 3481 Received: from vmicros1.altlinux.org (vmicros1.altlinux.org [194.107.17.57]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Mon, 9 Mar 2020 19:33:34 +0000 (UTC) Received: from mua.local.altlinux.org (mua.local.altlinux.org [192.168.1.14]) by vmicros1.altlinux.org (Postfix) with ESMTP id 7101872CCE7; Mon, 9 Mar 2020 22:33:33 +0300 (MSK) Received: by mua.local.altlinux.org (Postfix, from userid 508) id 2DD3B7CC7FF; Mon, 9 Mar 2020 22:33:33 +0300 (MSK) Date: Mon, 9 Mar 2020 22:33:33 +0300 From: "Dmitry V. Levin" To: "Eric W. Biederman" 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" Subject: Re: [PATCH v2 5/5] exec: Add a exec_update_mutex to replace cred_guard_mutex Message-ID: <20200309193332.GA13534@altlinux.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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <871rq12vxu.fsf@x220.int.ebiederm.org> 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 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? -- ldv