On Tue, Jan 17, 2012 at 10:13 AM, Minchan Kim [off-list ref] wrote:

This patch makes new device file "/dev/low_mem_notify".
If application polls it, it can receive event when system
memory pressure happens.

This patch is based on KOSAKI and Marcelo's long time ago work.
http://lwn.net/Articles/268732/

I'm not loving the ABI. Alternative solutions:

  - SIGDANGER + signalfd() for poll

  - sys_eventfd()

  - sys_mem_notify_open() similar to sys_perf_event_open()

                        Pekka

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