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=-2.1 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,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 73EC9C677FC for ; Thu, 11 Oct 2018 21:30:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 228C020841 for ; Thu, 11 Oct 2018 21:30:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CMCTaqFp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 228C020841 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726376AbeJLE7R (ORCPT ); Fri, 12 Oct 2018 00:59:17 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:35174 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725858AbeJLE7R (ORCPT ); Fri, 12 Oct 2018 00:59:17 -0400 Received: by mail-wm1-f66.google.com with SMTP id e187-v6so10964699wmf.0; Thu, 11 Oct 2018 14:30:10 -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:in-reply-to:user-agent; bh=TZ/XjSZEURH8lk59EVbHXcBZEWeH44yu85s6JWLw80Y=; b=CMCTaqFpJB9wmyrr0pyCsDUgGu8xhtOaqnM4umPioVa/7Q6aos8V4YK/QHuGmG1fPZ 14Yjz70OWf+RrPG4I58jMweU+EpUsUP/kqEQNKE0GJXhBlaCBdmd9Lhhn3xbk33wNFOj hsZU43I7c3nZ+vv2FLjMYIjHzs+LIanpoilAOKB6VJ9jtFd+/hwFhjDOTAOxZ6hP+6T+ BM9OBiVj/+mmV8hWTlu95660QlGroDJUygVlqccHWjvTQFB/GSyjl56RqrqQ4PdCp8sZ PzGsczJ2m9xtaOrgmJGOYQqPPuQcs623W84iawH8cBqC+YQAHJaxQP84zN6IFUTJhEgv P1Ww== 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:in-reply-to:user-agent; bh=TZ/XjSZEURH8lk59EVbHXcBZEWeH44yu85s6JWLw80Y=; b=QoauXvp55VO91DGklYxlH1Nb771dkViQOEEMXH1eda448kF6OjZpjDCK3pcKUEchUN hmb7fhiXSvRGw5S14gts5WclBjR1Bt4UUBHXTvstKhQicQShgFj1RkODFkj/J4Wzk5Yr CVz14mxkyf191nanWZMioL7WeJxK7ulS8j+t4pwXrfRIArkAHrPMuq6D8QQnnUliPMhy FH0y/r1+NtgV6Zr1+o3xalEzTERIlAPabHSgdNzoR7/sKMkqS6n7xnbvIPavfuWxb/ZF TLBCQEQP9cJj914ptRHKzwFSNji4cGf1+f6CdcRkKTC7cYU1wkb0EkKMno8f3LNnj9qz 8FlQ== X-Gm-Message-State: ABuFfohb2o9EyYxhadY+4PiQPvsdAHKmTksnQ1onAo/vgfhsgbxHn/1V PEWe4Jy0ewKStQfmI9qysg== X-Google-Smtp-Source: ACcGV61BoxDKS4bZQSVbYpcOQDhF/SzSQNKgSi4qtSjTCjjgckjnclFsKd5JmVPi1AM3wpHfuyONxQ== X-Received: by 2002:a1c:3795:: with SMTP id e143-v6mr3175212wma.9.1539293409303; Thu, 11 Oct 2018 14:30:09 -0700 (PDT) Received: from avx2 (nat4-minsk-pool-46-53-177-92.telecom.by. [46.53.177.92]) by smtp.gmail.com with ESMTPSA id a11-v6sm6957076wrp.3.2018.10.11.14.30.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Oct 2018 14:30:08 -0700 (PDT) Date: Fri, 12 Oct 2018 00:30:06 +0300 From: Alexey Dobriyan To: Cyrill Gorcunov Cc: Rafael David Tinoco , linux-kselftest@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, shuah@kernel.org Subject: Re: [PATCH] proc: fix proc-self-map-files selftest for arm Message-ID: <20181011213006.GA13485@avx2> References: <20181011184359.15627-1-rafael.tinoco@linaro.org> <20181011205601.GA32757@avx2> <20181011210256.GE2401@uranus.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20181011210256.GE2401@uranus.lan> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 12, 2018 at 12:02:56AM +0300, Cyrill Gorcunov wrote: > On Thu, Oct 11, 2018 at 11:56:01PM +0300, Alexey Dobriyan wrote: > > > > As the comment in the beginning says this test is specifically for addresss 0. > > Maybe it should be ifdeffed with __arm__ then. > > Is there some other reason than allocating non-mergable VMA? IIRC the reason is to test address 0 as it is effectively banned for userspace so if it will be broken, it will be broken silently for a long time. As for "unmergeable" libc here doesn't map /dev/zero. I know how to avoid even theoretical breakage by creating binaries by hand but it will be probably too much.