Messages in this thread | | | Date | Wed, 18 Nov 2009 19:40:53 +0000 | From | Matthew Garrett <> | Subject | Re: [PATCH] [RFC] Add support for uevents on block device idle changes |
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On Wed, Nov 18, 2009 at 08:30:07PM +0100, Kay Sievers wrote:
> Wouldn't it be good enough, if we add a file "idle_since" which > contains the time of the actual disk idle time, and userspace can > schedule a re-examination of that value at the actual end of the idle > time it is looking for?
That would require either polling or waking up a userspace application on every disk access. Doing it in-kernel involves only a single timer wakeup for every active/idle transition.
-- Matthew Garrett | mjg59@srcf.ucam.org
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