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Date: Tue, 17 Jan 2012 11:27:34 +0200
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Subject: Re: [RFC 1/3] /dev/low_mem_notify
From: Pekka Enberg <penberg@kernel.org>
To: Minchan Kim <minchan@kernel.org>
Cc: linux-mm <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>,
        leonid.moiseichuk@nokia.com, kamezawa.hiroyu@jp.fujitsu.com,
        Rik van Riel <riel@redhat.com>, mel@csn.ul.ie, rientjes@google.com,
        KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Marcelo Tosatti <mtosatti@redhat.com>,
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On Tue, Jan 17, 2012 at 10:13 AM, Minchan Kim <minchan@kernel.org> wrote:
> +static unsigned int low_mem_notify_poll(struct file *file, poll_table *wait)
> +{
> +        unsigned int ret = 0;
> +
> +        poll_wait(file, &low_mem_wait, wait);
> +
> +        if (atomic_read(&nr_low_mem) != 0) {
> +                ret = POLLIN;
> +                atomic_set(&nr_low_mem, 0);
> +        }
> +
> +        return ret;
> +}

Doesn't this mean that only one application will receive the notification?

                        Pekka