export kernel clock information to user space

[Arnd Bergmann]

On Wednesday 13 October 2010 08:49:42 Amit Kucheria wrote:
> That is something I've been wondering about too. At the moment, tools like
> powerdebug have to periodically re-read the entire clock tree to show
> updates. AFAIK, sysfs and debugfs don't support inotify/poll/select mechanisms to
> notify changes.
> 
> It would be nice to have notification, but I don't know how hard that would
> be for a virtual filesystem.

Sysfs normally uses udev events to notify the user of changes. Not sure what
the mechanics behind this are, probably a netlink socket.

Supporting fanotify or inotify in your own file system should be very easy,
the somewhat harder part is to write the file system in the first place.

	Arnd