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Date: Thu, 30 Jan 2014 00:46:57 -0800
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [RFC] shmgetfd idea
Message-ID: <20140130084657.GA31508@infradead.org>
References: <52E709C0.1050006@linaro.org>
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To: John Stultz <john.stultz@linaro.org>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>, Greg KH <gregkh@linuxfoundation.org>, Kay Sievers <kay@vrfy.org>, Android Kernel Team <kernel-team@android.com>, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@suse.de>, Hugh Dickins <hughd@google.com>, Dave Hansen <dave@linux.vnet.ibm.com>, Rik van Riel <riel@redhat.com>, Michel Lespinasse <walken@google.com>, Johannes Weiner <hannes@cmpxchg.org>, "H. Peter Anvin" <hpa@linux.intel.com>, Neil Brown <neilb@suse.de>, Andrea Arcangeli <aarcange@redhat.com>, Takahiro Akashi <takahiro.akashi@linaro.org>, Minchan Kim <minchan@kernel.org>, Lennart Poettering <mzxreary@0pointer.de>

On Mon, Jan 27, 2014 at 05:37:04PM -0800, John Stultz wrote:
> In working with ashmem and looking briefly at kdbus' memfd ideas,
> there's a commonality that both basically act as a method to provide
> applications with unlinked tmpfs/shmem fds.

Just use O_TMPFILE on a tmpfs file and you're done.

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