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

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Message-ID: <ac3eb2510911190309y6d0d8445wd907fc5664595c6f@mail.gmail.com>
Date:	Thu, 19 Nov 2009 12:09:30 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	David Zeuthen <david@...ar.dk>, linux-kernel@...r.kernel.org,
	axboe@...nel.dk, linux-hotplug@...r.kernel.org
Subject: Re: [PATCH] [RFC] Add support for uevents on block device idle 
	changes

On Wed, Nov 18, 2009 at 22:33, Matthew Garrett <mjg59@...f.ucam.org> wrote:
> On Wed, Nov 18, 2009 at 10:06:33PM +0100, Kay Sievers wrote:
>
>> That's true, but I think there is a significant difference between
>> polling every one or two seconds for media changes, and usually one or
>> two minutes for a disk idle. It's not that we poll in a rather hight
>> frequency, in an arbitrary interval, and check if some condition is
>> met.
>
> My use cases are on the order of a second.

Ok, what's the specific use case, which should be triggered after a
second? I thought you were thinking about disk spindown or similar.

Kay
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