Re: [PATCH] [RFC] Add support for uevents on block device idle changes

Matthew Garrett
2009-11-18T21:35:30Z

On Wed, Nov 18, 2009 at 10:29:23PM +0100, Kay Sievers wrote:

> I guess, the "idle_since" file could be made poll()able, and throw an
> event when the idle time is re-set to 0, so the value checking needs
> only to happen as long we wait for the disk to become idle. As long as
> it's busy anyway, the rare wakeups should not matter much. :)

That'd be a userspace wakeup every time something gets submitted to the
block device, which sounds far from ideal...

--
Matthew Garrett | mjg59@srcf.ucam.org