Re: export kernel clock information to user space

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