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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT autolearn=ham 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 E1D63C282DC for ; Wed, 17 Apr 2019 16:56:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B29B62173C for ; Wed, 17 Apr 2019 16:56:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Jczd3cpc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732978AbfDQQ4g (ORCPT ); Wed, 17 Apr 2019 12:56:36 -0400 Received: from mail-lf1-f66.google.com ([209.85.167.66]:40504 "EHLO mail-lf1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731454AbfDQQ4g (ORCPT ); Wed, 17 Apr 2019 12:56:36 -0400 Received: by mail-lf1-f66.google.com with SMTP id a28so19427680lfo.7 for ; Wed, 17 Apr 2019 09:56:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=LTV52Z6BxXAqi3K2r/MRVHJk1VnWNiq5p7fdQW/kY3w=; b=Jczd3cpcmjVN17SWHwPXYFIr/r8IgvK4yb/Xo/ti+K7aDRPM4CmgvMlbHZR7errpPM +NNb8zpzlCTQdSNaDffzREAnY2jGht9PfkcrBApXEL0VYfUaPcxsB5p2NGzwSJJ+mPvx sq0fJiGFqKe9TSQ5OY0SQ3jZFtkCnMTQuV+kzo07Z5wUOqs07LiSNPzcigtQWEOJENQA doM9l7mu3O/KAZtT6a22JAv6qpqOyPQPXVg0snHzZDZM90IRkSjCN/qnXtFz3erW8kZx jtAztCLOPl7QEqVAsHT7uK/OiqW/dqbsL+dCE01PAtxBCB4SaJeDPmVf6Be3x959PI2D Xkfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=LTV52Z6BxXAqi3K2r/MRVHJk1VnWNiq5p7fdQW/kY3w=; b=fhdLsuHjM4UetuD+PEAYSETLvrF1XSknl3wClR7AK4vEKjQP2Ok7xY89dWVkCu/bS8 yBF/9Clh6Li9lDx7u/CJCa5YkmchwLAnwFFDWFJMFG6e+bSvYZFH+N5+viVP8ao+sKCL 4UNdjdbibNmZwSOgH4rje8M4Jb8u5Vt0h6e8MgJbbXkY0se2Isj8j7biO6MEMmvXW+lO JfVQ9+wvkEUg9lYAApjmWpY6nJY5Lr96rYBAM4WGPpX7f8RHtNEXjlFKbj4OwI1k/O9S 4/1kfKL4W+pPgXX0e3guov+pE0l5YBv5DHojuAmA4sEc7zGt0SrrFBL+R7vKC1L6f6+M DG7w== X-Gm-Message-State: APjAAAWMvPJAZpglnZe9OS2jYlrIwXBgb3cxOIZ0gUPUgg9RCwh6LqBN iYhr4xtaIv/DP3GuB/SbjbM= X-Google-Smtp-Source: APXvYqw4yTz4rrMBIUJm+TTb5e8GVILyFlbd39oLCvf+NmTttucbZqiSvLVp/QU937Qm43g0H2ImSw== X-Received: by 2002:ac2:528e:: with SMTP id q14mr7638680lfm.83.1555520193790; Wed, 17 Apr 2019 09:56:33 -0700 (PDT) Received: from uranus.localdomain ([5.18.103.226]) by smtp.gmail.com with ESMTPSA id v11sm10991007ljk.19.2019.04.17.09.56.32 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 17 Apr 2019 09:56:33 -0700 (PDT) Received: by uranus.localdomain (Postfix, from userid 1000) id 9CB0C46010A; Wed, 17 Apr 2019 19:56:32 +0300 (MSK) Date: Wed, 17 Apr 2019 19:56:32 +0300 From: Cyrill Gorcunov To: Michal =?iso-8859-1?Q?Koutn=FD?= Cc: kbuild-all@01.org, Michael Kerrisk , Sergey Senozhatsky , Randy Dunlap , kbuild test robot , Michal Hocko , Andrew Morton , Yang Shi , Andrew Morton , Andrey Vagin , LKML , Pavel Emelyanov Subject: Re: [PATCH] prctl: Don't compile some of prctl functions when CRUI Message-ID: <20190417165632.GC3040@uranus.lan> References: <20180420140044.478b4c88d3cf238bd440f2a7@linux-foundation.org> <20190417122349.GA15498@blackbody.suse.cz> <20190417123841.GA3040@uranus.lan> <20190417144454.GG8962@blackbody.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190417144454.GG8962@blackbody.suse.cz> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 17, 2019 at 04:44:54PM +0200, Michal Koutný wrote: > On Wed, Apr 17, 2019 at 03:38:41PM +0300, Cyrill Gorcunov wrote: > > I've a bit vague memory what we've ended up with, but iirc there was > > a problem with brk() syscall or similar. Then I think we left everything > > as is. > Was this related to the removal of non PR_SET_MM_MAP operations too? > Do you have any pointers to the topic? Here some details: suprisingly there are already users of PR_SET_MM_x operands, so we can't deprecate it (https://lkml.org/lkml/2018/5/6/127). And then there was an attempt to change locks https://lore.kernel.org/patchwork/patch/ but since we're modifying mm-> entries we should gurd them against simultaneous sys_brk call. Or I misunderstood you and you meant somthing different?