linux-ext4 - Re: [RFC PATCH 0/7] dax, ext4: Synchronous page faults

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Message-ID: <20170811100327.GD7064@infradead.org>
Date:   Fri, 11 Aug 2017 03:03:27 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Dave Chinner <david@...morbit.com>, linux-xfs@...r.kernel.org,
        Andy Lutomirski <luto@...nel.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: [RFC PATCH 0/7] dax, ext4: Synchronous page faults

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.