From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-fsdevel-owner@vger.kernel.org>
Received: from bombadil.infradead.org ([65.50.211.133]:59746 "EHLO
        bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751932AbdHKKDe (ORCPT
        <rfc822;linux-fsdevel@vger.kernel.org>);
        Fri, 11 Aug 2017 06:03:34 -0400
Date: Fri, 11 Aug 2017 03:03:27 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Jan Kara <jack@suse.cz>, Christoph Hellwig <hch@infradead.org>,
        linux-nvdimm <linux-nvdimm@lists.01.org>,
        Dave Chinner <david@fromorbit.com>, linux-xfs@vger.kernel.org,
        Andy Lutomirski <luto@kernel.org>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>
Subject: Re: [RFC PATCH 0/7] dax, ext4: Synchronous page faults
Message-ID: <20170811100327.GD7064@infradead.org>
References: <20170727131245.28279-1-jack@suse.cz>
 <x49zibq3rb0.fsf@segfault.boston.devel.redhat.com>
 <20170727215713.GA22000@linux.intel.com>
 <CALCETrVzxrQ76BXEfo4kcRFyQmxbrMwCLE17yPyTJzz0tUs+Dg@mail.gmail.com>
 <20170728093821.GB29433@quack2.suse.cz>
 <20170801110241.GE6742@infradead.org>
 <20170801112603.GG4215@quack2.suse.cz>
 <CAPcyv4hdOsuA6cqRCnOZMLMXvycwZevg06xOVZz3u0kupm2Drw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <CAPcyv4hdOsuA6cqRCnOZMLMXvycwZevg06xOVZz3u0kupm2Drw@mail.gmail.com>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Mon, Aug 07, 2017 at 05:24:08PM -0700, Dan Williams wrote:
> Does sys_mmap() reject unknown flag values today? I'm either not
> looking in the right place or it's missing and we'll need some
> interface/mechanism to check if MAP_SYNC is honored.

It doesn't seem to reject unknown flags.

The lack of flags checking strikes back once more, sighṫ.