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Date: Sun, 17 Sep 2017 19:39:45 +0200
From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Jan Kara <jack@suse.cz>, "Darrick J. Wong" <darrick.wong@oracle.com>,
	Arnd Bergmann <arnd@arndb.de>,
	"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
	Linux API <linux-api@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-xfs@vger.kernel.org, linux-mm <linux-mm@kvack.org>,
	Andy Lutomirski <luto@kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v4 2/3] mm: introduce MAP_VALIDATE a mechanism for
	adding new mmap flags
Message-ID: <20170917173945.GA22200@lst.de>
References: <150277752553.23945.13932394738552748440.stgit@dwillia2-desk3.amr.corp.intel.com> <150277753660.23945.11500026891611444016.stgit@dwillia2-desk3.amr.corp.intel.com> <20170815122701.GF27505@quack2.suse.cz> <CAA9_cmc0vejxCsc1NWp5b4C0CSsO5xetF3t6LCoCuEYB6yPiwQ@mail.gmail.com>
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On Sat, Sep 16, 2017 at 08:44:14PM -0700, Dan Williams wrote:
> So it wasn't all that easy, and Linus declined to take it. I think we
> should add a new ->mmap_validate() file operation and save the
> tree-wide cleanup until later.

Note that we already have a mmap_capabilities callout for nommu,
I wonder if we could generalize that.

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