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Thu, 07 Feb 2008

Memory notification events.

Jake Edge posted an article at LWN.net about various memory pressure notification, which userspace application may be insterested in.
For example they can wait for swap in/out notifcaitinos or oom condition far before it is killed by oom-killer, so it could free some unused ram (like firefox could free some recently viewed pages cache).

Notifications are transferred to userspace via /dev/mem_notify file, which is readable and pollable. Alternative way is to use SIGIO signal to the process when the device becomes readable.
Patch likely will be accepted soon.

This is another example of the real need for unified event management subsystem in the Linux kernl.

/devel/kevent :: Link / Comments (0)

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